SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS October 2008 No. OCC09 ELECTRICAL CONTROL GUIDE [Model names] R410A INVERTER PLA-RP·BA(2) PEAD-RP·EA(2) PEAD-RP·GA PKA-RP·GAL PKA-RP·FAL(2) [Model names] PUHZ-HRP71/100VHA PUHZ-HRP100/125YHA PUHZ-HRP71/100VHA2 PUHZ-HRP100/125YHA2 CONTENTS 1. 2. 3. 4. 5.
1 REFERENCE SERVICE MANUAL For information on service, please refer to the service manual as follows. 1-1. INDOOR UNIT Model name Service Ref. Service Manual No. PLA-RP35/50/60/100/125BA PLA-RP71/100/125BA2 PLA-RP35/50/60/100/125BA(1).UK/BA#2.UK PLA-RP71/100/125BA2.UK PKA-RP35/50GAL PKA-RP35/50GAL(#1) PKA-RP60/100FAL PKA-RP50FAL2 PKA-RP60/100FAL(#1) PKA-RP50FAL2(#1) PEAD-RP50/60/71/125EA PEAD-RP35/100EA2 PEAD-RP50/60/71/125EA(#1).UK PEAD-RP35/100EA2(#1).
MICROPROCESSOR CONTROL 2-1. SYSTEM CONSTRUCTION w The figures below show the system construction with wiring diagram of superimposed power supply system. For wiring of separate indoor/outdoor unit power supply, refer to OUTDOOR UNIT’S SERVICE MANUAL. (1) System construction A-control model which just wires the connecting line between the indoor and outdoor unit and supply the power is applicable to any models of standard (1:1), twin and triple. (Refer to (5) Start-up system.
(2) The transmitting specification for “A” control 1Wiring regulations Communications between indoor and outdoor units Superimposed power supply system:80m Separate indoor/outdoor unit power supplies:120m ( The length of the total wiring including the wiring among indoor units in addition to the wiring between indoor and outdoor units ( Section Communications from remote controllers Maximum length of total 500m wiring Maximum numbers of connection Up to 16 indoor units are connectable to 1 remote 1 ou
(3) The waveforms of remote controller communications The following graphs are the examples for measuring waveforms on the wirings of remote controlled transmission at the terminal block for remote controller. a) A measuring example in the sequence of startup b) A measuring example during normal stop 7.5 seconds Transmission from remote controller 7.
(4) The waveforms of communications between indoor and outdoor units The following graphs are the examples for measuring waveforms on the wirings of connecting indoor and outdoor units at between S2 and S3 of the outdoor terminal block TB1.
(5) Start-up system A control unit is applicable to any models of standard (1:1), twin and triple without switch setting according to carrying out the below process automatically when the power is supplied.
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3 INDOOR UNIT CONTROL 3-1. COOL OPERATION Control modes 1. Compressor Remarks Control details 1-1. Thermoregulating function (Function to prevent restarting for 3 minutes) • Room temperature Set temperature +0.5 ···Compressor ON • Room temperature Set temperature -1.5 ···Compressor OFF +1 The thermoregulating function is provided in the outdoor unit. The indoor unit transmits the indoor room temperature and set temperature data to outdoor unit, then the outdoor unit controls thermoregulation. 1-2.
Control modes 3-1. Drain pump control •Always drain pump ON during the COOL and DRY mode operation. (Regardless of the compressor ON/ OFF) •When the operation mode has changed from the COOL or DRY to the others (including Stop), turn the drain pump ON for 3 minutes then stop the operation. 3-2. Liquid level detection method Drain sensor type • Energize drain sensor at a fixed voltage for a fixed duration.
3-2. DRY OPERATION Control modes 1. Compressor Control details Remarks 1-1. Thermoregulating function (Including the function to prevent restarting for 3 minutes) Setting the compressor operation time by the thermoregulating signal and the room temperature (TH1). Thermoregulating signal ON Room temperature Set temperature +1 Thermoregulating signal OFF Room temperature Set temperature Room temp. Range of room temp.
From the previous page Control details Remarks 3-2. Liquid level detection method Drain sensor type If any of the following conditions is met, liquid level detection is performed. Drain pump is ON. Indoor liquid pipe temperature - indoor room temperature -10 (except during defrosting) Indoor liquid pipe temperature or indoor room temperature is at the short or open level temperature. Every 1 hour after the drain pump has been switched from ON to OFF.
3-4. HEAT OPERATION Control modes 1. Compressor Remarks Control details 1-1. Thermoregulating function (Function to prevent restarting for 3 minutes) • Room temperature Set temperature -1 ···Compressor ON • Room temperature Set temperature +1 ···Compressor OFF ;1 The thermoregulating function is provided in the outdoor unit. The indoor unit transmits the indoor room temperature and set temperature data to outdoor unit, then the outdoor unit controls thermoregulation. 1-2.
Control details Control modes 3. Fan Remarks By the remote controller setting (switch of 4 speeds+Auto or 4 speeds or 2 speeds) Type Fan speed notch 4 speeds+Auto [Low] [Medium2] [Medium1] [High][Auto] 4 speeds [Low] [Medium2] [Medium1] [High] 2 speeds [Low] Fan speed change notch. Refer to the model function table. [High] 3-1. Hot adjust mode 3-2. Preheating exclusion mode 3-3. Thermostat OFF mode (When the compressor off by the thermoregulating) 3-4.
Control details Control modes 4. Drain pump Remarks 4-1. Drain pump control Drain sensor type The drain pump turns ON for the specified amount of time when any of the following conditions is met (regardless of whether the compressor is ON or OFF). ON for 3 minutes after the operation mode is switched from COOL or DRY to HEAT mode. ON for 6 minutes after the drain sensor is determined to be submerged using the liquid level detection method given below.
From the previous page Control details Control modes Remarks 4. Drain pump 4-4. Forced compressor stop · This detection is The function is to stop the unit forcibly (System stopped) to prevent water different from drain leakage when the drain pump breaks down and the refrigerant leakage pump abnormality. occurs in the linear expansion valve. Conditions to detect When the following conditions are fully met (Always detected regardless of whether the unit is ON or OFF) Drain pump is ON.
3-6. STOP OPERATION Control modes Control details 1. Drain pump 1.1 Drain pump control Drain sensor type The drain pump turns ON for the specified amount of time when any of the following conditions is met (regardless of whether the compressor is ON or OFF) ON for 3 minutes after the operation mode is switched from COOL or DRY to another operation mode. ON for 6 minutes after the drain sensor is determined to be submerged using the liquid level detection method given below.
3-7. SUPPLEMENTARY INFORMATION (UNIT FUNCTION SETTING) (For setting, refer to OUTDOOR UNIT’S SERVICE MANUAL.) 1) Vane setting (Function setting mode11) Model Setting No. PLA-BA(2) Setting 1 Downward position than the standard (less smudging setting) 2 Standard position 3 Upward position than the standard (less draft setting) + + Be careful of the smudge on ceiling.
4 OUTDOOR UNIT CONTROL 4-1. COOL OPERATION Control modes 1. Compressor Control details Remarks 1-1. Thermoregulating function The outdoor unit receives information of set temperature and intake temperature from the indoor unit through transmission and judges the necessity of thermoregulating from their temperature difference. (Refer to “INDOOR UNIT CONTROL” for detailed detecting method.) 1-2. Normal control Refer to “4-7.
From the previous page. Control modes 1. Compressor Control details Remarks 1-6. Discharge temperature over-rise prevention control Frequency controls such as Hz-down and no more Hz-up will be conducted according to the discharge temperature (TH4). Temperature restriction: No more Hz-up ··· When TH4 detects 105 or more Hz-down ··· -6Hz per min. when TH4 detects 110 or more ··· -10Hz per min. when TH4 detects 118 or more 1-7.
Control modes 3. LEV(A) Control details Remarks 3-1. Normal control Opening pulse will vary among steps (1 to 3) according to air conditioner’s operating status. • Control timing: Once every 5 minutes after 3 or 7 minutes have passed since the compressor started. • LEV opening pulse for each step: Step 1 2 3 71 100 125 170 240 480 170 240 480 170 240 480 • Requirement for step-up LEV opening pulse will step up when any of following conditions is satisfied.
Control modes 4. LEV(B) Control details Remarks 4-1. Normal control LEV opening pulse will be controlled according to the change of compressor operating frequency and regulated every minute to adjust the discharge temperature to let the intake super heat temperature be 0 to 5 . • Control timing: Once per minute after 3 or 7 minutes have passed since the compressor started. • Opening pulse range: The following range is specified according to the compressor operating frequency.
4-2. HEAT OPERATION Control details Remarks 1-1. Thermoregulating function The outdoor unit receives information of set temperature and intake temperature from the indoor unit through transmission and judges the compressor ON/OFF controlled by thermoregulating from their temperature difference. However, the compressor does not stop when the indoor unit is in the hot adjuster mode even though the information tells the need to turn off the compressor.
From the previous page. Control details Control modes 1. Compressor Remarks 1-5. Condensing temperature over-rise prevention control Frequency controls such as Hz-down and no more Hz-up will be conducted according to the indoor cond./eva. temperature (TH5) (V/YHA) /the pressure saturation temp. (T63HS) (V/YHA2). Temperature restriction (TH5) No more Hz-up Hz down (-5 Hz per min.). Hz down (-10 Hz per min.).
Control modes 3. LEV(A) Control details Remarks 3-1. Normal control LEV opening pulse will be controlled every minute to adjust the discharge temperature in order to let the intake super heat be 0 to 5 . • Control timing: Once per minute after 3 or 7 minutes have passed since the compressor started. • Opening pulse range: The following range is specified according to the compressor operating frequency.
Control modes 4. LEV(B) Remarks Control details 4-1. Normal control Opening pulse will vary among steps (1 to 3) according to air conditioner’s operating status. • Control timing: Once every 5 minutes after 3 or 7 minutes have passed since the compressor started. • LEV opening pulse for each step: Step 71 100 125 1 2 3 140 220 480 140 220 480 140/150 220 480 • Start-up step The step is set to 2 when the compressor starts up.
Control modes 5. LEV(C) Control details 6-1. Requirement for starting INJ INJ starts when all of the following conditions are satisfied. (1) The outdoor outside temp. (TH7) is 3 or less. (2) The compressor frequency is 65Hz or more. (3) The condensation temperature (Indoor 2-phase pipe temp. (TH5) (V/YHA)/ Pressure saturation temp. (T63HS) (V/YHA2)) is 56 or less. (4) Having no abnormal delay. 6-2.
4-3. DRY OPERATION Control modes 1. Compressor Control details 1-1. Thermoregulating function The outdoor unit receives information of set temp. and intake temp. from the indoor unit through transmission and judges the compressor ON/OFF with thermoregulating function from their temperature difference. 1-2. Normal control Same control as that of COOL operation. 1-3. Start-up control Same control as that of COOL operation. 1-4. Indoor anti-freezing control Not available 1-5.
4-4. FAN OPERATION Control modes Control details Remarks Control details Remarks 1-1. Requirements for starting Defrosting starts whe any of the following conditions is satisfied. (Conditions) a. In HEAT operation and when the outdoor liquid pipe temp. (TH3) continues to be -2 or less for 7 minutes after the compressor integrating operation time fulfils defrosting prohibition time (т1 +). b. In HEAT operation and when the outdoor liquid pipe temp.
From the previous page. Control modes 2. Stop Control details Remarks 2-2. Actuator at the end of defrosting operation Activate the actuator by the following procedure if any of the above conditions except d & e is detected. Start the outdoor fan. Let the compressor operation frequency down to 30Hz from the defrosting operation frequency. Stop the compressor for 1 minute when the compressor operation frequency becomes 30Hz.
4-6. AUTO OPERATION Control modes Control details Remarks 1. Initial operation mode When a operation mode turns into AUTO operation; HEAT mode will be operated if intake temperature < set temperature COOL mode will be operated if intake temperature set temperature HEAT mode will turn into COOL mode when intake temperature set temperature + 2deg 2. Change of operation mode and 15 minutes have passed since the HEAT operation started.
Control modes 4. Power supply to locked compressor Control details Remarks “08” will be displayed on the LED1 of “A-Control Service Tool” while power is supplied to the compressor. 4-1. Compressor energizing method • Compressor ON/OFF pattern when power is supplied; 4hrs ON 30 min.+ 30 min. + Repeated + Outdoor temp. 21 OFF 30 min. 30 min. Energized the outside temperature is 21 or less Outdoor temp.>21 30 min. Power supply Cycle : 15 min. ON 30 min.
From the previous page. Control modes 2. During replacement operation Control details 2-2. Indoor frozen prevention control The compressor will be stopped for 3 minutes if the indoor liquid pipe temperature (TH2) or indoor condenser/evaporator temperature (TH5) is 3 or less after 10 minutes have passed since the compressor started. Remarks + Frozen protection control may be activated when the indoor intake temp. is 15 or less. 4-9.
5 SYSTEM CONTROL 5-1. VARIETY OF SYSTEM CONTROL FUNCTIONS System Name A.Remote controller operation (Standard) System Diagram Indoor unit Outdoor unit Indoor unit B.Remote controller operation Use of 2 controllers enables operation of the air conditioner both from a distance and nearby. Remote Controller Remote Controller * One of the wired remote controllers must be set as a sub remote controller. C.
System Name System Diagram • Weekly timer: In addition to ON/OFF, up to 8 temperature patterns can be set for each day of the week. *Only 1 timer can be selected; the auto off, simple and weekly timers cannot be combined. • Simple timer: Start and stop operations can each be performed once within 72 hours (can be set in 1-hour increments). • Auto off timer:Operation is stopped when the preset time elapses following the start of operation.
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5-4. GROUP CONTROL OPERATION (COLLECTIVE OPERATION AND CONTROL OF MULTIPLE REFRIGERANT SYSTEMS (2 to 16)) ● Multiple Mr.Slim air conditioners can be operated with the same settings (e.g., operation mode, preset temperature, etc.) by using 1 remote controller. Each outdoor unit can be turned ON/OFF individually by the intake sensor. ● Up to 16 refrigerant systems can be controlled as a group by 1 remote controller. ● A refrigerant address must be set for each outdoor unit.
5-5. POWER OUTAGE AUTOMATIC RECOVERY OPERATION • Whenever a power outage or switching of the power supply causes the power supply of an operating air conditioner to go from OFF to ON, this function will automatically restore the operation of the air conditioner to its previous operating mode. w If the power is turned from OFF to ON when the air conditioner is not in operation, the air conditioner will not automatically be turned on.
(3) Part specifications (2) Basic wiring diagram Remote/local selection switch Control circuit power supply No.1 unit relay box No.
5-8. OBTAINING REMOTE DISPLAY Use the remote operation adapter (PAC-SF40RM-E) to provide operation/error non-voltage contact output and on/off input function.
(2) Basic pattern for timer control Use a no-voltage contact point output timer (one that has separate circuits for the load side and timer power supply). a) Timer-independent control b) Combined control by timer and remote controller As selected by remote controller operation switch. Orange From indoor unit T Red SW ON Timer control SW OFF Remote controller control Orange From indoor unit T Red Brown Brown SW (3) Basic system Refer to 5-7 COMBINED REMOTE / LOCAL CONTROL. 5-10.
5-13. MULTIPLE REMOTE CONTROL DISPLAY You can control several units with a multiple remote control display, by wiring an optional multiple remote controller adapter (PAC-SA88HA-E) with relays and lamps on the market. How to wire (1) Connect the multiple remote controller adapter to the connector CN51 on the indoor controller board. (2) Wire three of the five wires from the multiple remote controller adapter as shown in the figure below.
5-15. DEMAND CONTROL Demand control is available by external input. In this mode, power consumption is decreased within the range of usual 0~100%. How to wire Insulate this point securely as this is not used. Procured locally Relay power supply Adaptor for external signal input (PAC-SC36NA) Outdoor unit controller board Red 3 Brown 2 Orange 1 ~ SW1 X CNDM X SW1 : Switch X : Relay (Contact spec. : DC1mA) Max.
5-16. ROTATION FUNCTION (AND BACK-UP FUNCTION, 2ND STAGE CUT-IN FUNCTION) 5-16-1. Operation (1) Rotation function (and Back-up function) • Outline of functions · Main and sub units operate alternately according to the interval of rotation setting. w Main and sub unit should be set by refrigerant address. (Outdoor Dip switch setting) Main unit Refrigerant address "00" Refrigerant address "01" Sub unit · When error occurrs to one unit, another unit will start operation.
• System constraint · This function is available only in cooling mode. Ex.) Set temp. by R/C = 20: Set point = 26: When request code number is “323”. 26: 2nd unit Cut-in [2nd stage cut-in function]··· Request code number "322~324" Start operation Main unit IC-1 Room temp. Set point Sub unit start operation Room temp. < Set point -4 Sub unit stop Run 4 degree C 22: 2nd unit Cut-out Sub unit IC-2 Stop Run 20: 5-16-2.
(2) Setting method of each function by wired remote controller B: Refrigerant address C: Data display area D: Request code display area 1. Stop operation( ). 2. Press the TEST button ( ) for 3 seconds so that [Maintenance mode] appears on the screen ( ). After a while, [00] appears in the refrigerant address number display area. (at ) 3. Press the CHECK button ( ) for 3 seconds to switch to [Maintenance monitor].
HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN Copyright 2008 MITSUBISHI ELECTRIC ENGINEERING CO., LTD. Distributed in Oct. 2008 No.OCC09 PDF 7 Made in Japan New publication, effective Oct. 2008 Specifications subject to change without notice.
