SiENBE28-901 Service Manual Air Cooled Refrigeration Condensing Unit LRLEQ5AY1(E) LRLEQ6AY1(E) LRLEQ8AY1(E) LRLEQ10AY1(E) LRLEQ12AY1(E) LRLEQ15AY1(E) LRLEQ20AY1(E) LRMEQ5AY1(E) LRMEQ6AY1(E) LRMEQ8AY1(E) LRMEQ10AY1(E) LRMEQ12AY1(E) LRMEQ15AY1(E) LRMEQ20AY1(E)
SiENBE28-901 Air Cooled Refrigeration Condensing Unit LRMEQ5AY1, 6AY1, 8AY1, 10AY1, 12AY1, 15AY1, 20AY1 LRLEQ5AY1, 6AY1, 8AY1, 10AY1, 12AY1, 15AY1, 20AY1 Air Cooled Refrigeration Condensing Unit 1 1 LRMEQ5AY1, 6AY1, 8AY1, 10AY1, 12AY1, 15AY1, 20AY1 1 LRLEQ5AY1, 6AY1, 8AY1, 10AY1, 12AY1, 15AY1, 20AY1 1 1. Introduction .............................................................................................2 2. Standard Specification ......................................................................
Introduction SiENBE28-901 1. Introduction Safety Precautions Before performing design, construction, or maintenance, thoroughly read the "Safety Precautions" and also the "Installation Manual" and "Operation Manual" that come with this product. Precautions are classified as " WARNING" or " CAUTION" for the purpose of this Section. Items that mishandling highly potentially induces serious consequences such as death or serious injury are specially described under " WARNING".
SiENBE28-901 Introduction CAUTION (6) Do not start or stop the air conditioner using the POWER SUPPLY switch. Doing so may result in a failure or water leakage. (10) To clean the equipment, be sure to set the POWER SUPPLY switch to "OFF" to turn OFF all power supplies. Not doing so may result in injury because the internal fan rotates at high speeds. (7) Do not repair electrical parts with wet hand. Doing so may result in an electric shock.
Introduction SiENBE28-901 WARNING (16) Conduct electrical works according to information in the "Electrical Equipment Technical Standards", "Internal Wiring Regulations", and Installation Manual, and further be sure to use dedicated circuits. Insufficient capacity of the power supply circuit and faulty electrical works will result in an electric shock or a fire.
SiENBE28-901 Introduction WARNING (24) Check power supply terminals for deposition of dust or for any loose terminals. Deposition of dust on or imperfect connections of the terminals will result in an electric shock or a fire. Not doing so will result in an electric shock, heat generation, or a fire. (26) Do not connect the power supply cord halfway or with many loads of other electrical fittings on one electric outlet.
Introduction SiENBE28-901 Air Cooled Refrigeration Condensing Unit Nomenclature Outdoor unit LR M E Q 5 A Y1 Power supply symbol Y1: 3φ 380-415V, 50Hz Indicates major design category Capacity indication 5: 5HP Refrigerant Q: R-410A Compressor type E: Intermediate INJ type Temperature zone to be used M: Medium temperature (MT) L: Low temperature (LT) Product category L: Low temperature air conditioner R: Outdoor unit 6 Air Cooled Refrigeration Condensing Unit
SiENBE28-901 Standard Specification 2. Standard Specification 2.1 Standard Specification LRMEQ5AY1 [LRMEQ5AY1E] Model 1 Power Supply 3 phase 50Hz 380-415V Capacity 2 kW Range of Suction Pressure Equivalent Saturation Temperature °C Range of Outdoor Temperature °C Casing Color 12.2 -20~+10 -15~+43 mm 1680×635×765 Heat Exchanger Cross fin coil Type Piston Displacement Compressor Number of Revolutions Motor Output × Number of Units Hermetically sealed scroll type m3/h 10.04 13.85 r.p.
Standard Specification SiENBE28-901 LRMEQ8AY1 [LRMEQ8AY1E] Model 1 Power Supply kW Range of Suction Pressure Equivalent Saturation Temperature °C Range of Outdoor Temperature °C 18.6 21.8 -15~+43 Ivory white (5Y7.5/1) [Light camel (2.5Y6.5/1.5)] Dimensions: (H×W×D) mm 1680×930×765 Heat Exchanger Cross fin coil Type Piston Displacement Compressor Number of Revolutions Motor Output × Number of Units Hermetically sealed scroll type m3/h 19.68 23.36 25.27 r.p.
SiENBE28-901 Standard Specification LRMEQ15AY1 [LRMEQ15AY1E] Model 1 Power Supply 3 phase 50Hz 380-415V Capacity 2 kW Range of Suction Pressure Equivalent Saturation Temperature °C Range of Outdoor Temperature °C Casing Color 32.2 37.0 -20~+10 -15~+43 Ivory white (5Y7.5/1) [Light camel (2.5Y6.5/1.
Standard Specification SiENBE28-901 LRLEQ5AY1 [LRLEQ5AY1E] Model 1 Power Supply 3 phase 50Hz 380-415V Capacity 2 kW Range of Suction Pressure Equivalent Saturation Temperature °C Range of Outdoor Temperature °C Casing Color 5.4 -45~-20 -15~+43 mm 1680×635×765 Heat Exchanger Cross fin coil Type Piston Displacement Compressor Number of Revolutions Motor Output × Number of Units Hermetically sealed scroll type m3/h 10.04 13.85 r.p.m 4740 6540 kW 2.
SiENBE28-901 Standard Specification LRLEQ8AY1 [LRLEQ8AY1E] Model 1 Power Supply kW Range of Suction Pressure Equivalent Saturation Temperature °C Range of Outdoor Temperature °C 8.0 9.4 -15~+43 Ivory white (5Y7.5/1) [Light camel (2.5Y6.5/1.5)] Dimensions: (H×W×D) mm 1680×930×765 Heat Exchanger Cross fin coil Type Piston Displacement Compressor Number of Revolutions Motor Output × Number of Units Hermetically sealed scroll type m3/h 19.68 23.36 25.27 r.p.
Standard Specification SiENBE28-901 LRLEQ15AY1 [LRLEQ15AY1E] Model 1 Power Supply 3 phase 50Hz 380-415V Capacity 2 kW Range of Suction Pressure Equivalent Saturation Temperature °C Range of Outdoor Temperature °C Casing Color 13.6 15.1 -45~-20 -15~+43 Ivory white (5Y7.5/1) [Light camel (2.5Y6.5/1.
SiENBE28-901 2.2 Standard Specification Set Values for Functional Components and Protection Devices Component Inverter Compressor STD1 STD2 Electric symbol Type Overcurrent protection device Type Overcurrent protection device Type Overcurrent protection device Output Fan motor Overcurrent protection device Output Overcurrent protection device PCB M2C M3C M1F M2F A1P PCB for compressor INV A3P JT17GFKTNYE@SB — 13A — — — — 1.5A 3.0A — — 750W — — 3.
Standard Specification 2.
X1A X2A RY1 X3A NOTE)10 A9P BLK RED L1 L2 L3 N WHT T2A N=1 : TERMINAL STRIP 3.
X3A Z7C N=5 U M2C M 3~ V W U T W S V R K2M BLK A6P T1A X1A : TERMINAL STRIP 3.
W : TERMINAL STRIP TO THE OUTDOOR UNIT. : FIELD WIRING.
Standard Specification 2.
SiENBE28-901 Standard Specification LRLEQ8A, 10A, 12AY1(E) LRMEQ8A, 10A, 12AY1(E) CHECK VALVE RECEIVER FILTER ELECTRONIC EXPANSION VALVE SERVICE PORT PLATE TYPE HEAT EXCHANGER CHECK VALVE FUSIBLE PLUG CHECK VALVE PRESSURE REGULATING VALVE FILTER SIGHT GLASS ELECTRONIC EXPANSION VALVE FAN S4PH FOUR WAY VALVE STOP VALVE HIGH PRESSURE SWITCH (DEFROST) FILTER HEAT EXCHANGER M STOP VALVE SERVICE PORT GAUGE PORT HIGH PRESSURE SENSOR S1NPH CHECK VALVE CHECK VALVE LOW PRESSURE SENSOR HIGH PR
Standard Specification SiENBE28-901 LRLEQ15A, 20AY1(E) LRMEQ15A, 20AY1(E) CHECK VALVE RECEIVER FILTER ELECTRONIC EXPANSION VALVE SERVICE PORT PLATE TYPE HEAT EXCHANGER CHECK VALVE FUSIBLE PLUG CHECK VALVE PRESSURE REGULATING VALVE FILTER SIGHT GLASS FAN ELECTRONIC EXPANSION VALVE S4PH FOUR WAY VALVE STOP VALVE HIGH PRESSURE SWITCH (DEFROST) FILTER HEAT EXCHANGER M STOP VALVE SERVICE PORT GAUGE PORT HIGH PRESSURE SENSOR S1NPH CHECK VALVE CHECK VALVE CHECK VALVE CHECK VALVE FILTER CHEC
SiENBE28-901 2.6 Standard Specification Description and Layout of Functional Parts and Piping Diagram LRMEQ5, 6AY1 LRLEQ5, 6AY1 No. Name Symbol 1 Inverter compressor (INV) M1C 2 M1F Y1E Not used. Y2E 5 6 7 Fan motor Electronic expansion valve (Main: EV1) Electronic expansion valve (Injection: EV2) Four way valve High pressure sensor Low pressure sensor Function An inverter-driven compressor, which runs at operating frequencies in the range of 52Hz to 218Hz.
Standard Specification SiENBE28-901 LRMEQ5, 6AY1 LRLEQ5, 6AY1 FILTER CHECK VALVE (F) (16) (E) SERVICE PORT (19) RECEIVER (12) DOUBLE PIPE HEAT EXCHANGER FUSIBLE(10) PLUG CHECK VALVE PRESSURE REGULATING VALVE (11) ELECTRONIC EXPANSION (4) VALVE FILTER (D) SIGHT GLASS (20) CHECK VALVE FAN ELECTRONIC EXPANSION (3) VALVE (2) HEAT EXCHANGER M S4PH (A) FILTER STOP VALVE FOUR WAY VALVE (13) (5) STOP VALVE (14) HIGH PRESSURE SWITCH (DEFROST) GAUGE PORT HIGH PRESSURE SENSOR (9) S1NPH
SiENBE28-901 Standard Specification LRMEQ5, 6AY1 LRLEQ5, 6AY1 19 10 18 C R31T 2 M1F 17 6 S1NPH 12 7 S1NPL Y3S 5 13 Y2E 4 Y1E 3 S4PH 9 14 15 16 B R2T 11 A R1T 20 R5T E F R6T 8 S1PH 1 M1C R3T D Air Cooled Refrigeration Condensing Unit 23
Standard Specification SiENBE28-901 LRMEQ8, 10, 12AY1 LRLEQ8, 10, 12AY1 No. Name Symbol 1 Inverter compressor (INV) M1C 2 3 M2C M1F Y1E Not used. 5 Standard compressor (STD) Fan motor Electronic expansion valve (Main: EV1) Electronic expansion valve (Injection: EV2) Function An inverter-driven compressor, which runs at operating frequencies in the range of 52Hz to 232Hz. A compressor, which runs with commercial power supply. Used to operate a fan for heat exchange through an air heat exchanger.
SiENBE28-901 Standard Specification LRMEQ8, 10, 12AY1 LRLEQ8, 10, 12AY1 CHECK VALVE (14) (G) (23) ELECTRONIC EXPANSION (5) VALVE (20) SERVICE PORT (F) PLATE TYPE HEAT(16) EXCHANGER RECEIVER FILTER FUSIBLE PLUG (15) CHECK VALVE PRESSURE REGULATING VALVE (E) FILTER SIGHT GLASS (24) CHECK VALVE (3) FAN ELECTRONIC EXPANSION (4) VALVE HEAT EXCHANGER M (A) S4PH (17) FILTER STOP VALVE FOUR WAY VALVE STOP VALVE (18) HIGH PRESSURE SWITCH (DEFROST) (13) (8) SERVICE PORT (19) GAUGE PORT
Standard Specification SiENBE28-901 LRMEQ8, 10, 12AY1 LRLEQ8, 10, 12AY1 Y3E Y2S 23 14 22 6 7 16 D R32T C R31T 3 M1F 9 S1NPH 19 17 S4PH 13 21 10 S1NPL Y3S 8 B R2T Y1E 4 Y2E 5 11 S1PH 12 S2PH 20 15 18 24 R6T G A R1T 1 M1C 2 M2C R3T E R5T F 26 Air Cooled Refrigeration Condensing Unit
SiENBE28-901 Standard Specification LRMEQ15, 20AY1 LRLEQ15, 20AY1 No.
Standard Specification SiENBE28-901 LRMEQ15, 20AY1 LRLEQ15, 20AY1 CHECK VALVE (H) (27) ELECTRONIC EXPANSION (7) VALVE (24) SERVICE PORT (G) RECEIVER FILTER FUSIBLE PLUG (18) CHECK VALVE PRESSURE REGULATING VALVE (19) PLATE TYPE HEAT (20) EXCHANGER FILTER (F) SIGHT GLASS (28) CHECK VALVE FAN ELECTRONIC EXPANSION (6) VALVE (4) (5) HEAT EXCHANGER M (21) S4PH (10) GAUGE PORT HIGH PRESSURE SENSOR (17) CHECK VALVE CHECK VALVE FILTER CAPILLARY TUBE HIGH PRESSURE (15) SWITCH S2PH (C)
SiENBE28-901 Standard Specification LRMEQ15, 20AY1 LRLEQ15, 20AY1 20 27 18 26 Y3E Y2S Y5S 9 11 8 E R33T S1PH 14 D R32T C R31T 5 23 25 Y3S 10 21 S4PH 17 Y2E 7 19 24 Y1E 6 28 22 R3T F R6T H 4 13 S1NPL 12 S1NPH B R2T 16 S3PH 15 S2PH A R1T 1 M1C 2 M2C 3 M3C R5T G Air Cooled Refrigeration Condensing Unit 29
Field Settings SiENBE28-901 3. Field Settings 3.1 Field Setting From Outdoor Unit The target evaporation temperature can be calculated as follows: Tst : Target evaporation temperature Tsd : Evaporation temperature set by dip switches ΔTsp : Temperature correction setting by pushbuttons. ΔTsn : Temperature correction setting during night-time operation Tst = Tsd + ΔTsp + ΔTsn The evaporation temperature can be set by dip switches and pushbuttons on the outdoor unit PCB.
SiENBE28-901 Field Settings Tsd LRMEQ** LRLEQ** DS1 ON -10°C (0.47MPa) OFF -35°C (0.11MPa) 1 2 3 4 Factory set ON OFF 1 2 3 OFF 3 OFF 3 0°C (0.69MPa) -25°C (0.22MPa) 5°C (0.82MPa) -20°C (0.29MPa) 4 ON 4 ON 10°C (0.98MPa) OFF 1 2 -5°C (0.56MPa) OFF 3 -40°C (0.07MPa) 4 ON 1 2 -45°C (0.03MPa) 1 2 -15°C (0.37MPa) 3 OFF 4 ON 1 2 ON 1 2 -20°C (0.29MPa) Tsd LRMEQ** LRLEQ** DS1 3 4 -30°C (0.16MPa) 4 Tsd: The evaporation temperature set by the dip switches.
Field Settings SiENBE28-901 Setting at replacement by spare PCB Caution DIP switch setting after changing the main PCB to spare parts PCB In case of repair using this part, replace the part according to the following instruction. Make the following capacity and refrigeration / freezing settings subject to application models. Cut the power supply of the outdoor unit once and switch it on again after setting the switch of subject.
SiENBE28-901 Field Settings Refrigerator: LRMEQ5~20AY1 (E) LED EB**** Factory Set (the position of a switch) DS1DS2 ON OFF 1 Applicable model LRMEQ5AY1 (E) 2 3 DS1 4 1 2 3 DS2 4 Setting method (the position of switches) Set DS2-2 to ON ON OFF 1 2 3 4 LRMEQ6AY1 (E) 1 2 3 4 Set DS2-1 to ON ON OFF 1 2 3 4 LRMEQ8AY1 (E) 1 2 3 4 Set DS2-1 and DS2-2 to ON ON OFF 1 2 3 4 LRMEQ10AY1 (E) 1 2 3 4 Set DS1-4 to ON ON OFF 1 2 3 4 LRMEQ12AY1 (E) 1 2 3 4 Set DS1-4 and DS2-2 to ON ON OFF 1
Field Settings SiENBE28-901 (2) Setting in service mode Using pushbuttons on the Main PCB (A1P) enables a variety of settings shown below. BS1 BS2 BS3 MODE SET RETURN BS4 BS5 RESET The following 4 modes are available. a. Setting mode 1 ...... Initial state (while in normal operation): Used to make setting of the method of "Cool/Heat (H1P: OFF) selection". This mode is displayed while in "malfunction", "low noise control", and "demand control" as well. b. Setting mode 2 Setting mode 3 ......
SiENBE28-901 Field Settings LED display when power is on H2P blinks for the first five seconds when the power supply is turned on. If the equipment is normal, H2P will be turned off in five seconds. H2P lights for abnormality. k: ON h: OFF l: BLINK No. H1P H2P H3P H4P H5P H6P H7P 1 h l k h h h h No.
Field Settings SiENBE28-901 b-1. Setting mode 2 No. 0 2 Setting item Display of setting items H1P H2P H3P H4P H5P H6P H7P ΔTsp: Fine-tuning setting of evaporation temperature k Current limitation setting 3 Setting of limit value of outdoor fan taps 5 Setting of external low noise operation (Tax1, 2 and Tay1, 2 are set by setting 2-21.
SiENBE28-901 Field Settings b-2. Setting mode 2 (for service) 4 Setting item Display of setting items H1P H2P H3P H4P H5P H6P H7P INV compressor max. frequency step control Setting of night-time compressor reduction 10 frequency Set the start time with 2-8, set the end time with 2-9.
Field Settings SiENBE28-901 d. Setting method with the AIRNET or type-III checker. 1) In case of the AIRNET • Use Setting Mode 2-6 (AIRNET address). • Use Setting Mode 2-16 (virtual indoor unit address). 2) In case of a Type-III checker • Use Setting Mode 2-16 (virtual indoor unit address). No.
SiENBE28-901 Field Settings 3.1.1 Evaporation temperature correction at night-time, using an external contact The two methods can be used to increase the evaporation temperature at night-time below: 1. Receiving the time setting from the AIRNET (Setting Mode 2-8·9). 2. Using an external contact. The following describes the wiring needed to use an external contact. By a short-circuit between terminals A and C on the PCB (A5P) in the control box, the evaporation temperature can be corrected at night-time.
Description of Functions and Operation SiENBE28-901 4. Description of Functions and Operation 4.1 Operating Mode [Classification of operating modes] The table below lists all the operating modes available. Compressor Cooling operation (1 compressor) (2 compressors) (3 compressors) (Operating Mode) INV 1 INV+STD1 2 INV+STD1+STD2 3 INV+STD2 4 STD1 5 STD1+STD2 6 STD2 7 k k k k k k k k k k k 1 There are 8 operating modes available.
SiENBE28-901 Description of Functions and Operation 1) Operation Mode 1 Ta Ti HPSL HPS1 HP Td1 INV LP Tg Tce EV2 EV1 TL Ta Ti HPSL HP HPS1 LP HPS2 Td1 Td2 INV EV3 STD1 SV2 Tce Tg TL EV2 Air Cooled Refrigeration Condensing Unit EV1 41
Description of Functions and Operation SiENBE28-901 Ti Ta HPSL HP HPS1 HPS2 Td1 EV3 HPS3 Td2 INV Td3 STD1 SV2 STD2 SV3 Tce Tg TL EV2 42 EV1 Air Cooled Refrigeration Condensing Unit
SiENBE28-901 Description of Functions and Operation 2) Operation Mode 2 Ta Ti HPSL HP LP HPS1 HPS2 Td1 Td2 INV STD1 EV3 Tce SV2 Tg TL EV2 EV1 Ta Ti HPSL HP HPS1 HPS2 HPS3 Td1 EV3 Td2 Td3 INV STD1 STD2 Tce SV2 SV3 Tg TL EV2 EV1 Air Cooled Refrigeration Condensing Unit 43
Description of Functions and Operation SiENBE28-901 3) Operation Mode 3 Ta Ti HPSL HP HPS1 HPS2 HPS3 Td1 EV3 Td2 Td3 INV STD2 STD1 Tce SV3 SV2 Tg TL EV2 EV1 4) Operation Mode 4 Ta Ti HPSL HP HPS1 HPS2 HPS3 Td1 EV3 Td2 Td3 INV STD1 SV2 STD2 Tce SV3 Tg TL EV2 EV1 44 Air Cooled Refrigeration Condensing Unit
SiENBE28-901 Description of Functions and Operation 5) Operation Mode 5 (Defective of INV) Ta Ti HPSL HP LP HPS1 HPS2 Td1 Td2 INV STD1 EV3 Tce SV2 Tg TL EV2 EV1 Ta Ti HPSL HP HPS1 HPS2 HPS3 Td1 EV3 Td2 Td3 INV STD1 STD2 Tce SV2 SV3 Tg TL EV2 EV1 Air Cooled Refrigeration Condensing Unit 45
Description of Functions and Operation SiENBE28-901 6) Operation Mode 6 (Defective of INV) Ti Ta HPSL HP HPS1 HPS2 HPS3 Td1 EV3 Td2 Td3 INV STD2 STD1 Tce SV3 SV2 Tg TL EV2 EV1 7) Operation Mode 7 (Defective of INV) Ti Ta HPSL HP HPS1 HPS2 HPS3 Td1 EV3 Td2 Td3 INV STD2 STD1 SV2 Tce SV3 Tg TL EV2 EV1 46 Air Cooled Refrigeration Condensing Unit
SiENBE28-901 4.
Description of Functions and Operation 4.3 SiENBE28-901 Detailed Description of Functions (1) Startup control The actuators will be operated in the following sequence when the thermostat is turned on: 1 The outdoor fan will start to operate for 5 seconds. (This is intended to measure the outdoor temperature accurately.) 2 At power-up, the operation outputs (P1, P2) for low pressure conditions (see the chart on the right) will be turned on/off.
SiENBE28-901 Description of Functions and Operation Conversion table for using the evaporation temperature (set by the dip switches) to determine its pressure equivalent DS1 Tsd(Lpm1) LRMEQ** LRLEQ** ON -10°C (0.47MPa) OFF -35°C (0.11MPa) 1 2 3 4 Factory set ON ON OFF -45°C (0.03MPa) ON OFF 1 2 3 4 ON -40°C (0.07MPa) 1 2 3 4 ON -25°C (0.22MPa) 5°C (0.82MPa) -20°C (0.29MPa) ON 10°C (0.98MPa) OFF 1 2 3 4 -5°C (0.56MPa) OFF 0°C (0.69MPa) 1 2 3 4 -15°C (0.
Description of Functions and Operation SiENBE28-901 (3) Compressor control Compressor control Normal capacity control • Increase or decrease the compressor frequency using the low pressure as a controlled variable, in order to achieve the optimum cooling capacity for the target evaporation temperature (Tst). The target evaporation temperature value used will be the one set by the dip switches. (For details, see section 2, "Field Settings").
SiENBE28-901 Description of Functions and Operation (3)-1.
Description of Functions and Operation SiENBE28-901 (4) Fan control (4)-1. Outdoor fan control The outdoor fan will be controlled using the high pressure as the controlled variable, as shown in the flow below. Outdoor fan Fan control Lpm: Pressure equivalent to the target evaporation temperature HP: High pressure Every 20 to 60 seconds Fan speed-up control Increases the speed by 1 tap. or & • Lpm < 0.59 MPa • HP > 1.86 MPa & • Lpm ≥ 0.59 MPa • HP > Lpm + 1.
SiENBE28-901 Description of Functions and Operation (4)-5.
Description of Functions and Operation SiENBE28-901 (5) Electrical expansion valve control (5)-1. Outdoor electrical expansion valve (Y1E(EV1)) ······ This only applies to the Japanese domestic models. The valve will be activated when the reverse cycle defrost is used. For the LRM(L)EQ** models, a "0pls" command will be used all times. (5)-2.
SiENBE28-901 Description of Functions and Operation (7) Oil return control Recover the refrigeration oil that has been left standing in the system at regular intervals. Recover the oil into the outdoor unit, using a timer and low pressure.
Description of Functions and Operation SiENBE28-901 (10) Low pressure protection control If the pressure drops below 0.00 MPa, the system will cease operation. After 2 to 10 minutes in standby, the system will resume operation. For a period of 3 hours after power-up, the system will continue to check whether the suction stop valve is closed. If the stop valve is seen to be closed, the system will stop and declare a problem (abnormal stop).
SiENBE28-901 Test Operation 5. Test Operation 5.1 Refrigerant Piping [REFRIGERANT] This System use R410A refrigerant. Caution This unit is already filled with a certain amount of R410A. Never open liquid and gas shutoff valve until the step Specified in “5.4. CHECKS AFTER WORK COMPLETION”. The refrigerant R410A requires strict cautions for keeping the system clean, dry and tight. Read this chapter carefully and follow these procedures correctly. A.
Test Operation SiENBE28-901 5.1.1 To Piping Work Contractors Never open the shutoff valve until the steps specified in “5.2 FIELD WIRING” and “5.3.3 Checking of device and installation conditions” of piping. Do not use flux at the time of brazing and connecting refrigerant pipes. Use phosphorous copper brazing filler metal (BCuP-2), which does not require flux. Chlorine-based flux causes piping corrosion.
SiENBE28-901 Test Operation 5.1.2 Selection of Piping Material Make sure that the inner side and outer side of the piping used is clean and free of contaminants, such as sulphur, oxide, dust, chips, oil and fat, and water. It is desirable that the maximum oil adhesion in the piping is 30 mg per 10 m. Use the following type of refrigerant piping. Material: Seamless phosphorus deoxidized copper tube (C1220T-O for a maximum outer diameter of 15.9 mm and C1220T-1/2H for a minimum outer diameter of 19.
Test Operation SiENBE28-901 5.1.3 Drier Installation Caution This product requires that a drier be installed on liquid piping on site. (Operating the unit without a drier installed may result in equipment failure.
SiENBE28-901 Test Operation Tightening torque N•m (closes clockwise) Shutoff valve sizes Shaft (valve body) φ9.5 5.4~6.5 φ12.7 φ19.1 φ25.4 φ31.8 Valve cover Service port 13.5~16.5 8.1~9.9 Hexagon wrench: 4mm 18.0~22.0 27.0~33.0 Hexagon wrench: 8mm 22.5~27.5 26.5~29.4 Hexagon wrench: 10mm 44.1~53.9 11.5~13.9 ¢Opening method² 1. Remove the valve cover and turn the shaft anticlockwise with a hexagon wrench. 2. Turn the shaft until the shaft stops. 3. Tighten the valve cover securely.
Test Operation SiENBE28-901 5.1.5 Precautions for Piping Perform piping branching with the following conditions kept in mind. At the time of branching the liquid piping, use a T-joint or Y-joint and branch it horizontally. This will prevent an uneven flow of refrigerant. At the time of branching gas piping, use a T-joint and branch it so that the branched piping will be located above the main piping (see the illustration below).
SiENBE28-901 5.2 Test Operation Field Wiring 5.2.1 Procedure for Power Supply Wiring ¢Procedure for Power Supply Wiring² 1 2 B 3 4 5 L1 L2 6 L3 N 10 9 8 7 1 Power supply (3φ 380~415) 2 Branch switch or overcurrent circuit breaker (earth leakage circuit breaker) 3 Earth wire 4 Power supply terminal block 5 Mount insulation sleeves 6 Fix the power supply wiring for phases L1, L2, L3, and N, respectively, with the provided clamp (1) to the resin clamp.
Test Operation SiENBE28-901 Point for attention regarding quality of the public electric power supply This equipment complies with respectively: EN/IEC61000-3-11(1) provided that the system impedance Zsys is less than or equal to Zmax and EN/IEC61000-3-12(2) provided that the short-circuit power Ssc is greater than or equal to the minimum Ssc value at the interface point between the user’s supply and the public system. It is the responsibility of the installer or user of the equipment to ensure.
SiENBE28-901 Test Operation Remote operating switch wiring connections When installing a remote operating switch, clamp as indicated by the following diagram: X3M 1 2 Secure remote operating switch wiring to the resin block using a clamp (field supply). X3M wire specifications Electric wire thickness Max. wiring length Caution 0.75~1.
Test Operation 5.3 SiENBE28-901 Inspection and Pipe Insulation For piping work contractor, electrical work contractor, and trial run workers Never open the shutoff valve until the insulation measurement of the main power supply circuit is finished. The measured insulation value will become lower if the measurement is made with the shutoff valve opened. On completion of inspection and refrigerant charging, open the shutoff valve.
SiENBE28-901 Test Operation Gas side shutoff valve Shutoff valve service port Nitrogen Tank R410A Used for refrigerant replenishment (with siphon) Pressure-reducing valve Meter Liquid side shutoff valve Charge hose Valve Outdoor unit Vacuum pump Note: To indoor unit Field pipings Connection procedure for gauge manifold and vacuum pump Caution Conduct an airtight test and vacuum drying precisely through the service ports of both liquid and gas shutoff valves.
Test Operation SiENBE28-901 Liquid side shutoff valve Gas side shutoff valve Coking, etc. Indoor/Outdoor interunit piping Insulation material Piping lead-out hole lid Block Liquid side piping Open a knock hole at Gas side piping Note: After knocking out the holes, we recommend you remove burrs in the knock holes and paint the edges and areas around the edges using the repair paint. 5.3.3 Checking of Device and Installation Conditions Be sure to check the followings.
SiENBE28-901 5.4 Test Operation Checks after Work Completion Make sure the following works are complete in accordance with the installation manual. • Piping work • Wiring work • Air tight test/Vacuum drying • Installation work for indoor unit 5.5 Additional Refrigerant Charge For refrigerant filling contractor Use R410A for refrigerant replenishment. The R410A refrigerant cylinder is painted with a pink belt.
Test Operation SiENBE28-901 [Additional Refrigerant Charge] Caution Refer to the Operation Method of Shutoff Valves for the control method of the shutoff valves. Never charge liquid refrigerant directly from a gas line. Liquid compression may cause the compressor to fail. 1. The refrigerant must be noted for this product. Calculate the amount of additional refrigerant charge according to the label for the calculation of the amount of additional refrigerant charge. 2.
SiENBE28-901 Test Operation [Precautions for refrigerant cylinder] At the time of refrigerant filling, check whether the siphon tube is provided. Then locate the cylinder so that the refrigerant will be filled in the state of liquid (see table below). R410A is a mixed refrigerant, the composition of which may change and the normal operation of the system may not be possible if the refrigerant is filled in the state of gas. Cylinder provided with siphon tube.
Test Operation SiENBE28-901 Error diagnosis If the system cannot operate normal at the time of test run (i.e., the H2P indicator is lit), check with malfunction code on the system with the pushbutton switches on the PCB of the outdoor unit, and take the following steps. Make checks on other malfunction codes and pushbutton switches by referring to the provided Technical Guide.
SiENBE28-901 Troubleshooting 6. Troubleshooting 6.1 Checking Points at Servicing Symptoms and check points Symptoms Temperature inside the showcase is at abnormal level.
Troubleshooting SiENBE28-901 1. Guideline for right operating conditions. Item High pressure (MPa) Low pressure (MPa) Discharge pipe temperature (°C) Suction pipe temperature (°C) Measuring method Measure with a service checker or pressure gauge in a stable state 20 minutes or more after starting operation. Measure with a service checker or pressure gauge in a stable state 20 minutes or more after starting operation. Right range 2.1 - 2.7 MPa 0.0 MPa to target LPm + 0.
SiENBE28-901 Troubleshooting 2-2. Procedures to be taken after beginning emergency operation until compressor replacement is complete and normal operation resumes 1.Change the outdoor unit operation switch from "LOCAL" or "REMOTE" to "OFF". 2.Turn off the outdoor unit's main breaker. 3.Replace the defective compressor with a new one. 4.Turn the outdoor unit breaker back on. (*Make sure that the operation switch is set to "OFF" before turning on the main breaker.) 5.
Troubleshooting 6.2 No. 1 2 3 SiENBE28-901 List of Malfunction Codes Item STD compressor OC activation Earth leakage Abnormal high pressure level Code (Remote control display) Detection device Criteria E0 Current sensor 14.95A • Leakage breaker • Earth leakage breaker activates within 20 seconds after compressor startup E2 E3 • Leakage detector PCB • Leakage detector PCB is activated when HP<3.6MPa • High pressure switch • 3.
SiENBE28-901 6.3 Troubleshooting Checking Malfunction Codes by LED Lamps on PCB 1) Simple diagnosis by the LED error display In Setting Mode 1-11, the error status of each component can be checked by reading the blinking LED. [Steps] Operate the pushbuttons on the PCB (in Setting Mode 1) and malfunction codes will be displayed by LEDs. Follow the steps below to check your unit. 1. Press the MODE button (BS1). (Setting Mode 1 will be entered.) 2. Pressing the SET button (BS2) will go to item No.
Troubleshooting SiENBE28-901 2) In Setting Modes 1-14 and on, it is possible to use the LED to check the error and retry details, using the same steps as previously described (see the next page). NO Setting Large item BS1 BS2 BS3 BS4 BS5 MODE SET RETURN TEST RESET Middle item Small item Description 1 Setting Mode 1, No. 1 Reversed phase H7P blinks when reversed phase is detected. 2 Setting Mode 1, No. 1 INV earth leakage H6P blinks when INV earth leakage is detected.
SiENBE28-901 6.4 Troubleshooting Checking Malfunction Codes of the Condensing Unit Operate the pushbuttons on the PCB and malfunction codes will be displayed by LEDs. Setting Modes: 1-14, 15, 16, 20, 21, 22 [Steps] 1. Make sure that the "H1P" LED is OFF. (If the LED is ON, press the MODE button (BS1) once.) 2. Press the MODE button (BS1) once to enter the "monitor mode". 3. Pressing the RETURN button (BS3) will display the first digit of a malfunction code by LED. 4.
Troubleshooting 6.5 SiENBE28-901 Troubleshooting by RAM Monitor Using the RAM monitor makes it possible to check the following operating data. Use this monitor for troubleshooting. SP_No. Ver. Hp_code SP number Version of software (Used for updating the software for PCB) The comparison between HP_code and the model on the RAM Monitor screen is as follows.
SiENBE28-901 Troubleshooting [Sensor] Ta Td1 Td2 Td3 Ti Tce Tg1 TL HP LP CT1 CT2 Mark of paragraph of trouble repair Ta Td1 Td2 Td3 Ti Tce Tg TL HP LP — — Mark of electric wiring diagram chart R1T R31T R32T R33T R2T R3T R5T R6T S1NPH S1NPL A6P A7P Tcl — — Tcg — — Teg — — 52ci 52C1_[X5A] 52C2_[X6A] 20S1_[X9A] SV2_[X8A] SV3_[X15A] EV1 Mark of paragraph of trouble repair INV STD1 STD2 4 WAY VALVE SV2 SV3 EV1 Mark of electric wiring diagram chart M1C M2C M3C Y3S Y2S Y5S Y1E EV2 EV2 Y2E EV3
Troubleshooting SiENBE28-901 [Data] Mark on RAM Monitor SH TdSH1 TdSH2 TdSH3 Lpm Lpm1 ΔTm_ho Meaning (Calculation value from sensor) Suction super heat Discharge super heat(INV) Discharge super heat(STD1) Discharge super heat(STD1) Target evaporation temperature equivalent pressure (Lpm is saturation temperature equivalent pressure of Tst. Tst=f(Lpm)=Tsd+ΔTsp+ΔTsn=f(Lpm1)+f(ΔTm)+ΔTsn Target evaporation temperature equivalent pressure (Lpm1 is saturation temperature equivalent pressure of Tsd.
SiENBE28-901 Troubleshooting [Retry] Mark on RAM Monitor Error code F0 F3 F1 F3 F2 F3 F3 F3 F4 F5 F6 E3 E4 E6 F7 E0 F8 E0 F9 F10 F11 E5 L9 L8 F12 L5 F13 U2 F14 L4 F17 F21 P1 E7 F22 F24 F25 H7 E7 H7 Meaning Frequency of retrying of Abnormal Discharge Temperature(system) Frequency of retrying of Abnormal Discharge Temperature(INV) Frequency of retrying of Abnormal Discharge Temperature(STD1) Frequency of retrying of Abnormal Discharge Temperature(STD2) Frequency of retrying of Ac
Troubleshooting 6.6 SiENBE28-901 Flow Chart for Troubleshooting 6.6.1 “E0” STD Compressor Motor Overcurrent/Lock Remote Controller Display E0 Applicable Models LRMEQ8~20AY1 LRLEQ8~20AY1 Method of Malfunction Detection Detects the overcurrent with current sensor (CT). Malfunction Decision Conditions Malfunction is decided when the detected current value exceeds 14.95A for 2 seconds.
SiENBE28-901 Troubleshooting Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Is the stop valve open? NO Open the stop valve. YES Obstacle exists around the air outlet. NO YES Is the power supply voltage normal? YES NO Is the magnetic switch (K2M, K3M) normal? (∗1) YES NO Remove the obstacle. Correct the power voltage. Replace the magnetic switch.
Troubleshooting SiENBE28-901 6.6.2 “E2” Earth Leakage Remote Controller Display E2 Applicable Models LRMEQ5~20AY1 LRLEQ5~20AY1 Method of Malfunction Detection When there is a earth leakage (breaker ON/OFF) Time elapsed after power-on When there is a earth leakage (leakage detector PCB) The continuity of the high pressure switch is checked using the protective device circuit.
SiENBE28-901 Troubleshooting Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. More than 10 seconds passed since power-on NO YES Reset the power with the operation switch set to OFF. Earth leakage (breaker ON/ OFF): E2 Shut off power. Remove the compressor lead wire. YES No defective insulation on compressor NO Replace the defective parts.
Troubleshooting SiENBE28-901 6.6.3 “E3” Actuation of High Pressure Switch Remote Controller Display E3 Applicable Models LRMEQ5~20AY1 LRLEQ5~20AY1 Method of Malfunction Detection The protection device circuit checks continuity in the high pressure switch. Malfunction Decision Conditions Error is generated when the HPS activation count reaches the number specific to the operation mode. (Reference) Operating pressure of high pressure switch Operating pressure: 3.8MPa Reset pressure: 2.
SiENBE28-901 Troubleshooting Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Check for the points shown below. (1)Is the stop valve open? (2)Is the HPS connector properly connected to the main PCB? (3)Does the high pressure switch have continuity? Are the three points above OK? NO Rectify the defective points, if any. YES (1)Mount a pressure gauge on the high pressure service port.
Troubleshooting SiENBE28-901 6.6.4 “E4” Actuation of Low Pressure Sensor Remote Controller Display E4 Applicable Models LRMEQ5~20AY1 LRLEQ5~20AY1 Method of Malfunction Detection Abnormality is detected by the pressure value with the low pressure sensor. Malfunction Decision Conditions Error is generated when the low pressure is dropped under compressor operation. Low pressure <0.
SiENBE28-901 Troubleshooting Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. NO Is the stop valve open? Open the stop valve. YES (1)Mount a pressure gauge on the low pressure service port. (2)Reset the operation and then restart the operation. Are the characteristics of the low pressure sensor normal? (See ∗1.) NO Replace the low pressure sensor.
Troubleshooting SiENBE28-901 6.6.5 “E5” Inverter Compressor Motor Lock Remote Controller Display E5 Applicable Models LRMEQ5~20AY1 LRLEQ5~20AY1 Method of Malfunction Detection Inverter PCB takes the position signal from UVW line connected between the inverter and compressor, and the malfunction is detected when any abnormality is observed in the phasecurrent waveform.
SiENBE28-901 Troubleshooting Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Check if the stop valve is open. NO Local factor Open the stop valve. YES Check if the relay wires to the compressor are correct. YES NO Check if the connection of UVW phase order is correct. YES NO Replace the connecting wires and ensure right connection of the connector. Ensure correct connection.
Troubleshooting SiENBE28-901 6.6.6 “E7” Malfunction of Outdoor Unit Fan Motor Remote Controller Display E7 Applicable Models LRMEQ5~20AY1 LRLEQ5~20AY1 Method of Malfunction Detection While the fan motor is in operation, detect the malfunction related to the fan motor according to revolutions detected with the hall sensor IC.
SiENBE28-901 Troubleshooting Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. LRL(M)EQ15A, 20AY1 have 2 fans. Cut the power supply OFF and wait for 10 minutes. YES Check if any foreign substances around the fan. NO Remove the foreign substances.
Troubleshooting SiENBE28-901 Troubleshooting A No continuity of fuse (FIU) on the fan inverter PCB. YES Replace fan inverter PCB. NO Unable to rotate the fan manually with ease when removing the connector of the fan motor. YES Replace the corresponding fan motor. NO Resistance value between the power supply wire terminal of fan motor and the motor frame (metal) is 1MΩ and below. YES Replace the corresponding fan motor.
SiENBE28-901 Troubleshooting 6.6.7 “E9” Malfunction of Electronic Expansion Valve Coil Remote Controller Display E9 Applicable Models LRMEQ5~20AY1 LRLEQ5~20AY1 Method of Malfunction Detection To be detected based on continuity existence of coil of electronic expansion valve (Y1E) Malfunction Decision Conditions No current is detected in the common (COM [+]) when power supply is ON.
Troubleshooting SiENBE28-901 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Caution Turn power supply off, and turn power supply on again. YES Return to normal? NO The connector of outdoor unit PCB (A1P) for electronic expansion valve is connected. NO External factor other than malfunction (for example, noise etc.). Ensure correct connection. YES The coil resistance of electronic expansion valve is normal.
SiENBE28-901 Troubleshooting 6.6.8 “F3” Abnormal Discharge Pipe Temperature Remote Controller Display F3 Applicable Models LRMEQ5~20AY1 LRLEQ5~20AY1 Method of Malfunction Detection Abnormality is detected according to the temperature detected by the discharge pipe temperature sensor. Malfunction Decision Conditions When the discharge pipe temperature rises to an abnormally high level. Supposed Causes or Discharge pipe temp. >120°C continuously for 70 sec. or more Discharge pipe temp.
Troubleshooting SiENBE28-901 Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Connect the service checker. Press reset and start operation again. Is the refrigerant amount proper? NO YES Check the refrigerant piping line for clogging. NO Recover the refrigerant. Conduct vacuum drying, and then charge a proper amount of refrigerant. Rectify the clogging. YES Connect the service checker, and the restart the system.
SiENBE28-901 Troubleshooting 6.6.9 “H0” Three-sensor Malfunction Remote Controller Display H0 Applicable Models LRMEQ5~20AY1 LRLEQ5~20AY1 Method of Malfunction Detection Malfunction is detected from the values detected by pressure sensors and temperature sensors (thermistors). Malfunction Decision Conditions Three or more out of the pressure sensors and the temperature sensors (thermistors) causes a "Sensor malfunction", respectively.
Troubleshooting SiENBE28-901 Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. *Three or more sensors malfunction. Check for the malfunction history (malfunction code) on the remote controller to identify three or more malfunctioning sensors. (See*1) Check the malfunctioning sensor identified for their connector connection. Is the resistance normal? (*1) NO Properly connect it.
SiENBE28-901 Troubleshooting 6.6.10 “H3” Malfunction Related to High Pressure Switch Remote Controller Display H3 Applicable Models LRMEQ5~20AY1 LRLEQ5~20AY1 Method of Malfunction Detection Detect continuity in the high pressure switch in the protective device circuit. Malfunction Decision Conditions While the compressor stops running, there is no continuity in the high pressure switch.
Troubleshooting SiENBE28-901 6.6.11 “H7” Abnormal Outdoor Fan Motor Signal Remote Controller Display H7 Applicable Models LRMEQ5~20AY1 LRLEQ5~20AY1 Method of Malfunction Detection Detection of abnormal signal from fan motor. Malfunction Decision Conditions In case of detection of abnormal signal at starting fan motor.
SiENBE28-901 Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Caution Cut the power supply off. Is the fan motor connector (X2A) properly connected to the fan inverter PCB? NO Ensure correct connection. YES Check the connector of the fan motor (∗1). Check if the resistance of the fan motor lead wire between Vcc and UVW and between GND and UVW are balanced. NO Replace the fan motor.
Troubleshooting SiENBE28-901 6.6.12 “H9” Malfunction of Outdoor Air Thermistor Remote Controller Display H9 Applicable Models LRMEQ5~20AY1 LRLEQ5~20AY1 Method of Malfunction Detection Malfunction is detected from the temperatures detected by the outdoor air thermistor. Malfunction Decision Conditions While in operation, the thermistor causes a broken wire or a short circuit in it.
SiENBE28-901 Troubleshooting 6.6.13 “J2” Current Sensor Malfunction Remote Controller Display J2 Applicable Models LRMEQ5~20AY1 LRLEQ5~20AY1 Method of Malfunction Detection Malfunction is detected from the current value detected by current sensor. Malfunction Decision Conditions When the current value detected by current sensor becomes 5A or lower, or 40A or more during STD compressor operation.
Troubleshooting SiENBE28-901 6.6.14 “J3,J5,J8,J9” Faulty Thermistor Remote Controller Display J3,J5,J8,J9 Applicable Models LRMEQ5~20AY1 LRLEQ5~20AY1 Method of Malfunction Detection Malfunction is detected from the temperatures detected by thermistors. Malfunction Decision Conditions While in operation, any of the thermistors causes a broken wire or a short circuit in it.
SiENBE28-901 Troubleshooting Troubleshooting Caution NO Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Is the malfunction code "J3" displayed? YES There are multiple relevant thermistors. Identify the thermistor using the monitor mode of the outdoor unit PCB. Check for connector connection. (*1) Is the resistance normal? NO Properly connect it.
Troubleshooting SiENBE28-901 6.6.15 “JA” Malfunction of High Pressure Sensor Remote Controller Display JA Applicable Models LRMEQ5~20AY1 LRLEQ5~20AY1 Method of Malfunction Detection Malfunction is detected from the pressure detected by the high pressure sensor. Malfunction Decision Conditions When the high pressure sensor is short circuit or open circuit. (Not less than 4.3MPa, or 0.
SiENBE28-901 Troubleshooting Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. 1.Set the high pressure gauge. 2.Connect a RAM monitor. Are the characteristics of the high pressure sensor normal? (Make a comparison between the voltage characteristics (∗1) and the gauge pressure.) NO Replace the high pressure sensor.
Troubleshooting SiENBE28-901 6.6.16 “JC” Malfunction of Low Pressure Sensor Remote Controller Display JC Applicable Models LRMEQ5~20PY1 LRLEQ5~20PY1 Method of Malfunction Detection Malfunction is detected from pressure detected by low pressure sensor. Malfunction Decision Conditions When the low pressure sensor is short circuit or open circuit. (Not less than 1.8MPa, or -0.
SiENBE28-901 Troubleshooting Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Piping for different circuit is erroneously connected. YES Correct the piping. NO 1.Set the low pressure gauge. 2.Connect a RAM monitor. Are the characteristics of the low pressure sensor normal? (Make a comparison between the voltage characteristics (∗1) and the gauge pressure.) NO Replace the low pressure sensor.
Troubleshooting SiENBE28-901 6.6.17 “L1” Faulty Inverter PCB Remote Controller Display L1 Applicable Models LRMEQ5~20AY1 LRLEQ5~20AY1 Method of Malfunction Detection Malfunction is detected from the current values while waveform is outputted prior to the startup of compressor. Malfunction is detected from the values detected by the current sensor in synchronized operation at startup. Malfunction Decision Conditions An overcurrent (OCP) flows while waveform is outputted.
SiENBE28-901 Troubleshooting 6.6.18 “L4” Malfunction of Inverter Radiating Fin Temperature Rise Remote Controller Display L4 Applicable Models LRMEQ5~20AY1 LRLEQ5~20AY1 Method of Malfunction Detection Fin temperature is detected by the thermistor of the radiation fin. Malfunction Decision Conditions When the temperature of the inverter radiation fin increases above 93°C.
Troubleshooting SiENBE28-901 6.6.19 “L5” INV Compressor Instantaneous Overcurrent Remote Controller Display L5 Applicable Models LRMEQ5~20AY1 LRLEQ5~20AY1 Method of Malfunction Detection Malfunction is detected from the currents flowing in the power transistor. Malfunction Decision Conditions An overcurrent (59.1A) flows even instantaneously. Supposed Causes 116 Faulty compressor coil (e.g.
SiENBE28-901 Troubleshooting Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Is the stop valve open? NO Open the stop valve. YES Is the compressor lead wire normal? NO Replace the compressor lead wire. YES Are wirings and wire connections to the compressor normal? NO Correct the wirings and wire connections.
Troubleshooting SiENBE28-901 6.6.20 “L8” INV Compressor Overload Remote Controller Display L8 Applicable Models LRMEQ5~20AY1 LRLEQ5~20AY1 Method of Malfunction Detection Malfunction is detected from the currents flowing in the power transistor. Malfunction Decision Conditions Currents on the secondary side of the inverter come to the following values. (1) Not less than 19A for a period of consecutive 5 seconds (2) Not less than 16.
SiENBE28-901 Troubleshooting Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Is the stop valve open? NO Open the stop valve. YES Is the compressor lead wire normal? NO Replace the compressor lead wire. YES Are wirings and wire connections to the compressor normal? NO Correct the wirings and wire connections.
Troubleshooting SiENBE28-901 6.6.21 “L9” Faulty INV Compressor Startup Remote Controller Display L9 Applicable Models LRMEQ5~20AY1 LRLEQ5~20AY1 Method of Malfunction Detection Malfunction is detected from the signal waveforms of the compressor. Malfunction Decision Conditions The compressor startup sequence is not complete.
SiENBE28-901 Troubleshooting Troubleshooting Caution NO Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Is the first time for the compressor to start after installation? YES Is a proper amount of refrigerant charged? YES NO Is the stop valve open? NO Charge a proper amount of refrigerant. Open the stop valve. YES Refrigerant is slugging. (No power is applied for a period of not less than 6 hours.
Troubleshooting SiENBE28-901 6.6.22 “LC” Malfunction of Transmission (between Inverter PCB and Main PCB) Remote Controller Display LC Applicable Models LRMEQ5~20PY1 LRLEQ5~20PY1 Method of Malfunction Detection Check the communication state between the inverter PCB and the control PCB by microcomputer. Malfunction Decision Conditions When the correct communication is not conducted in certain period.
SiENBE28-901 Troubleshooting Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Is the connector connecting between each control PCB and each inverter PCB securely connected? (See *1) NO Properly connect the connector. YES Is the type of the inverter PCB correct? (See *2) NO Replace with a proper PCB. YES The insulation resistance of the INV compressor is not more than 100kΩ. YES Replace the INV compressor.
Troubleshooting SiENBE28-901 6.6.23 “P1” Power Supply Voltage Imbalance Remote Controller Display P1 Applicable Models LRMEQ5~20PY1 LRLEQ5~20PY1 Method of Malfunction Detection Malfunction is detected from the voltage imbalance from the PCB. Malfunction Decision Conditions The power supply voltage causes an imbalance of not less than approx.14V? Continue operation without deciding the malfunction.
SiENBE28-901 Troubleshooting 6.6.24 “P4” Faulty Radiation Fin Thermistor Remote Controller Display P4 Applicable Models LRMEQ5~20PY1 LRLEQ5~20PY1 Method of Malfunction Detection While the compressor stops running, detect the resistance of the radiation fin thermistor. Malfunction Decision Conditions The thermistor resistance comes to a value equivalent to an open or a short circuit.
Troubleshooting SiENBE28-901 6.6.25 “U1” Reverse Phase / Open Phase Remote Controller Display U1 Applicable Models LRMEQ5~20PY1 LRLEQ5~20PY1 Method of Malfunction Detection Make judgement by detecting the state of every phase in the reverse phase detection circuit. Malfunction Decision Conditions The power supply voltage has a reverse phase or the phase T is open.
SiENBE28-901 Troubleshooting 6.6.26 “U2” Abnormal Power Supply Voltage Remote Controller Display U2 Applicable Models LRMEQ5~20PY1 LRLEQ5~20PY1 Method of Malfunction Detection Malfunction is detected from the voltage of the main circuit capacitor in the inverter. Malfunction Decision Conditions When the voltage aforementioned is not less than 780V or not more than 320V, or when the current-limiting voltage does not reach 200V or more or exceeds 740V.
Troubleshooting SiENBE28-901 Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Check for power supply voltage. Voltage between phases: 380 to 415V (Y1) YES Power ON Power OFF NO Unbalanced power supply? (Not more than NO 2%: Phase voltage of not more than approx. 5V) YES Disconnect the cable from the compressor, and then check the compressor for the insulation resistance. YES The insulation resistance is low. (i.e.
SiENBE28-901 Troubleshooting A Power OFF Check for connector connections: Remove and insert the connectors shown below. Furthermore, check the connectors for terminal conditions and continuity.
Troubleshooting SiENBE28-901 [Check 1] Check for Causes of Rise in High Pressure Referring to the Fault Tree Analysis (FTA) shown below, identify faulty points.
SiENBE28-901 Troubleshooting [Check 2] Check for Causes of Drop in Low Pressure Referring to the Fault Tree Analysis (FTA) shown below, identify faulty points.
Troubleshooting SiENBE28-901 [Check 3] Check for Causes of Overheat Operation Referring to the Fault Tree Analysis (FTA) shown below, identify faulty points. Faulty discharge pipe temp.
SiENBE28-901 Troubleshooting [Check 4] Check for Power Transistor Checking failures in power semiconductors mounted on inverter PCB Check the power semiconductors mounted on the inverter PCB by the use of a multiple tester. z Multiple tester : Prepare the analog type of multiple tester. For the digital type of multiple tester, those with diode check function are available for the checking. z Turn OFF the power supply.
Troubleshooting SiENBE28-901 [Check 5] Check for Causes of Wet Operation Referring to the Fault Tree Analysis (FTA) shown below, identify faulty points. Refrigerant accumulation Excessive compressor ON-OFF ←See [Check 6].
SiENBE28-901 Troubleshooting [Check 6] Check for Refrigerant Amount Due to relationship to pressure control and electronic expansion valve control, the refrigerant amount needs to be judged according to operating conditions. Refer to information shown below for making judgements. Diagnosis of Refrigerant Overcharge 1. High pressure becomes higher. Consequently, overload control is exerted to make the capacity slightly inadequate. 2.
Troubleshooting SiENBE28-901 [Check 7] Vacuum Drying Procedure To conduct vacuum drying in the piping system, follow the procedure for shown below. Furthermore, if moisture can get mixed in the piping system, follow the procedure for shown below. 1. Vacuum drying • Use a vacuum pump that enables vacuuming to a vacuum level of -100.7kPa (5 torr, -755 mmHg).
SiENBE28-901 Troubleshooting [Check 8] List of Malfunction Codes Related to Inverter Protection device, etc. Compressor current Code L5 Name Condition for determining malfunction Major faulty point Inverter getting caught in liquid INV Compressor Inverter output causes an overcurrent Faulty compressor Instantaneous Overcurrent to flow even instantaneously. Faulty inverter PCB L8 Overcurrent of INV compressor (electronic thermal) The compressor performs overload operation.
Troubleshooting SiENBE28-901 [Check 9] Temperature and Resistance Characteristics of Thermistor Outdoor unit Suction air Discharge pipe Radiation fin Type Temperature(°C) Heat exchanger (Inlet and outlet) ST0601 Resistance(kΩ) ST0602 Resistance(kΩ) ST0901 Resistance(kΩ) PTP-46D-D1 Resistance(kΩ) -10 -5 0 5 10 15 20 25 30 35 40 45 50 55 60 65 112.0 85.5 65.8 51.1 40.0 31.6 25.1 20.1 16.2 13.1 10.7 8.8 7.2 6.0 5.0 4.2 10.9 8.6 6.9 5.5 4.4 3.6 2.9 2.4 2.0 1.6 1.4 1.1 1.0 0.82 0.70 0.60 1403.
SiENBE28-901 Troubleshooting [Check 10] Voltage Characteristics of Pressure Sensor PH = 1.38VH–0.69 PL = 0.57VL–0.28 VH : Output voltage [High pressure side] VDC VL : Output voltage [Low pressure side] VDC PH : High pressure (MPa) PL : Low pressure (MPa) Pressure detected PH, PL (kg/cm2) MPa 51.0 5.0 45.9 4.5 High pressure (PH) 40.8 4.0 35.7 3.5 30.6 3.0 25.5 2.5 20.4 2.0 (1.7MPa) Low pressure (PL) 15.3 1.5 10.2 1.0 5.1 0.5 0 -5.1 -0.5 -0.5 0 0.5 1 1.
0.005 0.01 0.02 0.05 0.1 50 -90 -80 -70 0.00 07 m 3 /kg 0.1 100 0.7 0.2 -60 -40 -50°C 150 0.9 0.5 0.8 075 0 .0 0 0.2 1.0 -30 0.3 -10 200 -20 1.1 m 3/ kg 1.0kJ/(kg • k) m 3/ kg 0.4 0.0 008 1.2 2.0 0°C 1.3 20 250 10 3 9m 30 3 / kg 50°C 350 80 90 400 Enthalpy kJ\kg 300 1.8 /kg 0.6 0 .0 00 1.5 0.0 008 5 m3 /kg 0.5 1.4 40 1.0 3 0.0 00 95 m 1.6 60 2.2 /kg 1.7 70 2.3 450 500 550 3 /kg 600 3 10 m /kg 3 5 m /kg 3 2 m /kg 1 m3 /kg 3 0.
SiENBE28-901 6.7 Troubleshooting Maintenance 1. Procedure for Removal of Parts from Refrigerant System As the results of checking a malfunction, if the malfunction results from part(s) used in the refrigerant system, remove the part(s) referring to the procedure for refrigerant recovery shown below. Location of malfunction Outdoor unit compressors (M1C, M2C and M3C) Procedure for maintenance Solenoid valves (for STD1 and STD2) 1 INV electronic expansion valve Refer to Maintenance 1.
Troubleshooting SiENBE28-901 1) Maintenance 1: Maintenance related to outdoor unit compressor Applicable parts 1 compressor • Compressors (M1C, M2C and M3C) • Solenoid valves (STD1 and STD2) • INV electronic expansion valve • Four way valve • High pressure switch No continuous operations allowed HPSL D HPS1 A HP a Td1 b INV LP Tg Tce C B EV2 c TL EV1 A: Discharge line maintenance valve B: Injection line maintenance valve C: Liquid stop valve D: Gas stop valve a, b, c: Service ports 1.
SiENBE28-901 Troubleshooting Applicable parts • Compressors (M1C, M2C and M3C) • Solenoid valves (STD1 and STD2) • INV electronic expansion valve • Four way valve • High pressure switch 2 compressors No continuous operations allowed Ta HPSL HP a D HPS1 HPS2 Td1 Td2 INV EV3 C A LP b STD1 SV2 Tce Tg B TL c EV2 EV1 A: Discharge line maintenance valve B: Injection line maintenance valve C: Liquid stop valve D: Gas stop valve a, b, c: Service ports 1.
Troubleshooting SiENBE28-901 Applicable parts • Compressors (M1C, M2C and M3C) • Solenoid valves (STD1 and STD2) • INV electronic expansion valve • Four way valve • High pressure switch 3 compressors No continuous operations allowed Ta A b HPSL a LP D HP HPS1 HPS2 HPS3 Td1 Td2 Td3 EV3 INV STD1 SV2 STD2 SV3 Tce C B TL c EV2 EV1 Tg A: Discharge line maintenance valve B: Injection line maintenance valve C: Liquid stop valve D: Gas stop valve a, b, c: Service ports 1.
SiENBE28-901 Troubleshooting 2) Maintenance 2: Maintenance of EV1 and EV2 Applicable parts 1 compressor • Main electronic expansion valve • Injection electronic expansion valve No continuous operations allowed HPSL D HPS1 A HP a Td1 b INV LP Tg Tce C B EV2 c TL EV1 A: Discharge line maintenance valve B: Injection line maintenance valve C: Liquid stop valve D: Gas stop valve a, b, c: Service ports 1. Turn off the operation switch for the outdoor unit.
Troubleshooting SiENBE28-901 Applicable parts 2 compressors • Main electronic expansion valve • Injection electronic expansion valve No continuous operations allowed Ta HPSL HP a D HPS1 b HPS2 Td2 Td1 STD1 INV EV3 C A LP SV2 Tce Tg B c TL EV2 EV1 A: Discharge line maintenance valve B: Injection line maintenance valve C: Liquid stop valve D: Gas stop valve a, b, c: Service ports 1. Turn off the operation switch for the outdoor unit.
SiENBE28-901 Troubleshooting Applicable parts 3 compressors • Main electronic expansion valve • Injection electronic expansion valve No continuous operations allowed Ta A b HPSL a LP D HP HPS1 HPS2 Td1 EV3 Td2 Td3 STD1 INV SV2 C HPS3 STD2 SV3 Tce Tg B TL c EV2 EV1 Tg A: Discharge line maintenance valve B: Injection line maintenance valve C: Liquid stop valve D: Gas stop valve a, b, c: Service ports 1. Turn off the operation switch for the outdoor unit.
Troubleshooting SiENBE28-901 3) Maintenance 3: Maintenance of showcase and dryer Applicable parts 1 compressor • Main electronic expansion valve • Injection electronic expansion valve No continuous operations allowed HPSL D HPS1 A HP a Td1 b INV LP Tg C Tce B EV2 c TL EV1 A: Discharge line maintenance valve B: Injection line maintenance valve C: Liquid stop valve D: Gas stop valve a, b, c: Service ports 1. Close the stop valve C to conduct pump down operation.
SiENBE28-901 Appendix (Supplementary Information) 7. Appendix (Supplementary Information) 7.1 Restriction Matter of Showcase • • • • The design pressure of the indoor unit must be 2.5MPa. Install an R410A mechanical thermostatic expansion valve on eachlindoor unit. Install an R410A solenoid valve (Max. operating differential pressure of 3.5 MPa (35 bars) or over) on the primary side of the mechanical thermostatic expansion valve described above for each indoor unit.
150 5.2kg 3.2kg 1.4kg LT 4.9kg 4.1kg 3.5kg 3.0kg 2.3kg 1.7kg 1.2kg 0.6kg Blower coil *Note) 1. Case of showcase the condition of capacity (evaporating temperature) MT (Medium temperature): –10°C LT (Low temperature): –35°C 2. Case of blower coil, the condition of capacity is 10°C (Td). Amount of refrigerant kg Capacity of showcase kW + Amount of refrigerant kg Capacity of blower coil kW 40kW or more 11.0kg 5.
SiENBE28-901 Appendix (Supplementary Information) Secret MJ–08023 Re-precaution: Hard-and-fast additional refrigerant charge in commissioning PR Model LRLCP14D1, 2 and all other convenience-pack models This is to inform you again of the precaution (MJ06053) "For additional charge in a commissioning of Conveni-pack, the upper limit shall be 1.3 times as much as that calculated.
Appendix (Supplementary Information) SiENBE28-901 Method of removed and replaced compressor in field This system’s compressor has gas injection pipe. When you replace the compressor, you must remove the piping fixture with gas injection pipe. Please follow the procedure, replace the compressor. Arrow view Gas injection pipe Method removed piping fixture for gas injection pipe (1) Insert the tool from behind the compressor, remove the hexagon head screw (A) and tube fixture (C).
SiENBE28-901 Appendix (Supplementary Information) Installation of alarm (Case example) Because the unit stopped abnormally, and the temperature in the storage had risen, goods preserved on the inside were deteriorated. (Cause) The abnormal stop occurred because of the problem of the unit, and they display the abnormal signal. However the distant location of the unit and lacking of the alarming system allow the damage spreads.
Appendix (Supplementary Information) 7.
Daikin Europe N.V. is approved by LRQA for its Quality Management System in accordance with the ISO9001 standard. ISO9001 pertains to quality assurance regarding design, development, manufacturing as well as to services related to the product. ISO14001 assures an effective environmental management system in order to help protect human health and the environment from the potential impact of our activities, products and services and to assist in maintaining and improving the quality of the environment.
