Service Technical Book GAUSͲ315EQTA Heat Pump Unit GAUͲA45HPA Tank Unit GAUͲ315EQTA Heat Pump Unit GAUͲA45HPA Sanden Heat Pump – Service Technical Book Page 1 of 48 Tank Unit GAUͲ315EQTA
Contents ͳǤ ʹǤ ͵Ǥ ͶǤ ͷǤ Ǥ Ǥ ͺǤ ͻǤ ͳͲǤ ͳͳǤ ͳʹǤ PATENTS This water heater may be protected by one or more patents or registered designs in the
1. Product Specifications *1 *1 *1 Ambient Temp. (Dry / Wet) 16oC / 17oC, Inlet Water Temp. 17oC, Outlet Water Temp.
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Heat Pump Unit GAUͲA45HPA Sanden Heat Pump – Service Technical Book Page 5 of 48
3. System Details How it works The Heat Pump Water Heater System heats water by transferring the heat from the surrounding air to the water using a refrigerant. The refrigerant is heated by a heat exchanger that absorbs heat from the surrounding air.
4. Basic Control Logic Specifications HP unit operates to achieve the target heat capability 4.5kW to output 65oC (fixed) water once the power is on. Conditions to start and end heating water are as stated below: Conditions to (1) Tank TH A 45 oC (Lack in residual hot water in tank) Start Operation (2) More than 24hrs passed since the last start of operation. (for anti-Legionella purpose) (3) Memory of last operation is lost. (First run after delivery, ROM writing error, etc.
Defrost Start of defrost is determined by the temperatures detected by Defrost TH and Inlet Air TH. If the condition meets one of the determination values, HP unit starts defrost drive. However, the defrost drive is cancelled for 12min after the compressor runs or 30min after defrost drive completes. Also, if GC Inlet TH > 32oC, defrost drive does not start. End of defrost is determined either by the temperature detected by Defrost TH or by the time passed after start.
5. Main Functional Components List Heat Pump Unit No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Part Name COMPRESSOR 8CS040XAA63 PRESSURE SWITCH CCBͲDB10 CE EVAPORATOR 5A GAS COOLER PCB A45HPA SETTING PANEL ASM.
Main Components Main PC Board Evaporator Compressor Fan Water Heat Exchanger –GC cooler Water Pump Water Valve GC Outlet ½ inch male Water Valve GC Inlet ½ inch male Connector Cover Detachable Water Filter Drain Plugs Supplies filtration for water going into HPU. It can be taken off for cleaning purpose.
Electrical Components Main PC Board Top Cover Terminal Block 3 x M4 Screws Timer Setting Panel Power Supply Earth Terminal Cover Connector Cover Tank Thermistor Cable Hose Timer Setting Panel PC Board Panel Housing Front Bezel Sheet Sanden Heat Pump – Service Technical Book Page 11 of 48
6. Main Functional Components Specifications Temperature-resistance conversion table Water inlet thermistor, Water outlet thermistor Temperature ( ) -10 0 10 Thermistor resistance (kȍ) Table 1 20 37.5 23.7 15.5 10.3 30 40 50 60 70 80 90 100 7.0 4.9 3.5 2.5 1.9 1.4 1.1 0.8 Table 2 Ambient thermistor Temperature ( ) -10 Thermistor resistance (kȍ) 12.0 7.20 4.45 2.83 0 10 20 30 40 50 60 70 80 90 100 1.85 1.24 0.84 0.59 0.42 0.31 0.23 0.
< Expansion Valve Coil Specifications > Part Name Dielectric strenght EX VALVE COIL UKV-A12V-B AC 1800V 1sec. Insulation resistance Rated voltage Current Coil resistance Insulation grade DC 500 V , 100Mȍ OR More Terminal - Housing DC 12V ± 10% 0.
< Water Circulation Pump Specifications > Part Name Pump type PC28L05 DC driver operation , Variable flow performance Coupling Caliber inlet / outlet Motor type Bearing type Direction of rotation Operating position Driving power supply : Vm Driving MAX voltage Flow variable system Insulation grade Fluid temperature Outer diameter ij27, Inside diameter ij18 (Quick fastener type) DC brushless motor Underwater slide shaft CCW Impeller shaft horizontal 282V [DC] +40% / -10% (254 395V [DC] ) Below 450V V
7. Maintenance The procedures to replace the functional components are shown in the following pages. Since this product utilises a high-pressurised gas (CO2), those components contained in the refrigerant circuit such as refrigerant pipes, heat exchanger, compressor, pressure switch, are not subject for replacement.
1) How to Replace Printed Circuit Board Remove Top Panel and Front Panel Retainer (6 screws) Remove Front Panel (5 screws) Remove Piping Cover (1 screw) Remove Terminal Block Cover .
Unplug all the necessary cable connectors and remove the earth screws(5 screws).
2) How to Replace Timer Setting Panel Remove Top Panel Press the top surface of Timer Setting Panel to release the snaps off the fitting on the base component Pull up Timer Setting Panel to remove it from the base Timer Setting Panel Take the Timer Setting Panel cable off the PCB Note: Remove the screw together with the harness holder (1 screw) End of Steps To put it back on, follow the same steps in back order Sanden Heat Pump – Service Technical Book Page 18 of 48
3) How to Replace Water Circulation Pump and its P14 O-Rings Remove Top Panel, Front Panel Retainer and Front Panel (11 screws) Remove Pump Cover (3 screws) Water Circulation Pump Unplug the pump cable connector Remove Quick Fasters (2 places) Remove the screws retaining the pump holder to take out the pump unit (2 screws) Pump Cable Connector P14 OͲring P14 OͲring P14 OͲrings also need to be replaced if a water leakage is confirmed on the joints See picture on the left
4) How to Replace Propeller Fan Blade and Fan Motor Remove Top Panel, Front Panel Retainer and Front Panel (11 screws) Fan Remove the fan blade retainer nut Note: This nut needs to be turned counter clockwise to remove.
5) How to Replace Thermistors Remove Top Panel, unplug all the necessary cable connectors and remove the earth screws. And remove the upper casing unit Upper casing unit Remove Right Side Panel (8 screws) Right Side Panel Remove the Thermistors (5 thermistors).
6) How to Replace Expansion Valve Coil Remove Top Panel, Front Panel Retainer and Front Panel (11 screws) Pull exp. valve upwards to take it off.
7) How to Replace Drain Plugs and P3 O-Rings Grab the drain plug with fingers and twist in clockwise direction Take off the OͲring on the tip of the drain plug End of Steps To put it back on, follow the same steps in back order Sanden Heat Pump – Service Technical Book Page 23 of 48
8) How to Replace Reactor Remove Top Panel and Front Panel Retainer (6 screws) Remove Case Reinforcement (PS) Remove Reactor Cover (1 screw) Remove Reactor screws (3 screws) Pull off the cable connector End of Steps To put it back on, follow the same steps in back order Sanden Heat Pump – Service Technical Book Page 24 of 48
8. Error Codes When an error has occurred, a red lamp on the LED status window turns on and an error code is displayed on the display window. The panel does not turn to the display sleep mode while the error code is shown. After a component is replaced or the inspection is completed, turn the breaker on/off several times to confirm the error does not re-occur. Below is the list of the error codes. If the corrective action does not solve the error problem, a malfunction of the PCB valve is highly likely.
Check Points Error Code E040 Error Contents Error Detection Condition & Diagnostic HP Water Outlet Over Temperature 1 When 80degC or more is detected: Connector No. or Maintenance Monitor No.
Check Points Error Code E044 Error Contents HP Discharge Temperature Thermistor Detection Error Error Detection Condition & Diagnostic When 50degC or less is detected - Check if discharge thermistor is fallen out - Check if expansion valve connector is fallen out or not connected properly E045 HP Defrost Thermistor Detection Error High Pressure Side Error Connector Colour CN4 White - Put thermistor back into the pocket on pipe if it is out.
Check Points Error Code E048 Error Contents High Ambient Temperature Defrost Drive Error Error Detection Condition & Diagnostic Connector No. or Maintenance Monitor No.
Check Points Error Code E102 Error Contents Error Detection Condition & Diagnostic INV Compressor Start Error Compressor start error detected in compressor operation control Connector No. or Maintenance Monitor No.
Check Points Error Code E111 Error Contents INV Transient OverCurrent Error on Hardware (inverter) Error Detection Condition & Diagnostic Connector No. or Maintenance Monitor No.
Check Points Error Code E113 Error Contents INV Transient OverCurrent Error on Software (inverter) Error Detection Condition & Diagnostic Connector No. or Maintenance Monitor No.
Check Points Error Code E121 Error Contents INV Power Supply LowVoltage Error Error Detection Condition & Diagnostic Connector No. or Maintenance Monitor No.
Check Points Error Code E124 Error Contents Error Detection Condition & Diagnostic INV Transient Power Cutoff Detection Error 2 Power cutoff detected in compressor operation control Connector No. or Maintenance Monitor No.
Check Points Error Code E140 Error Contents Error Detection Condition & Diagnostic INV Motor Operation Detection Error Compressor rotation error was detected Connector No. or Maintenance Monitor No.
Check Points Error Code E150 Error Contents Error Detection Condition & Diagnostic INV Serial Communication Error Communication error detected in compressor operation control Connector No. or Maintenance Monitor No.
9. Trouble Shooting Guide If you faced to a problem in a use of our heat pump water heater system, please check the following things prior to calling for a support. Status No hot water comes out of water tap Temperature of hot water is too low Considerable Causes Action to Take Small or no hot water is left in the storage tank.
Cleaning the Inlet Filter 1. 2. 3. 4. 5. 6. 7.
10. How to Use Timer Setting Panel 1. How to Operate 1-1 7-Segment Display 7-segment display on the timer setting panel ordinary displays the current time as a function of the Clock Display Mode. However, the display is switched to the Display Sleep Mode and turns off when no panel operation is performed for more than 60 seconds. Display Sleep Mode is cancelled when either of “UP”, “DOWN” or “Func/Enter” key is pressed.
1-3 Maintenance Mode Maintenance Mode is a function to check the heat pump status check and perform other settings. It should generally be assumed that a user do not operate this function. 1-3-1 Types of Maintenance Mode There are some modes as described below exist in the Maintenance Mode.
1-3-3 Block out time setting mode This mode is used to set the block out time that blocks the heat pump unit operation within the setting time. Block out times are used if the customer has a time of use tariff. Change the mode Press and hold down Up and Down keys together in the clock display mode to go to the block out time setting mode. Once the mode is changed, ‘bo’ and ‘00XX’ (00 = start time, XX = end time) are displayed.
1-3-4 Error History Display Mode 1) How to Change Mode Press and hold down “UP” and “DOWN” keys together in the Clock Display Mode to show the Block out Time Setting Mode. Press Enter key once to switch to the Error History Display Mode. “Err0” will be displayed when the mode is switched over. 2) How to Check Error History The display repeats “Err*” -> “E***” -> “****” in the Error History Display Mode. (“*” should be a number on the actual panel) “*” in “Err*” shows the number of errors.
E090 E101 E102 E110 E111 E112 E113 E114 E115 E120 E121 E122 E123 E124 E125 E130 E131 E140 E141 E150 Clock IC error Communication error INV compressor start error INV transient over-current error on hardware (converter) INV transient over-current error on hardware (inverter) INV transient over-current error on software (converter) INV transient over-current error on software (inverter) INV converter current detection circuit error INV inverter current detection circuit error INV power supply over-voltage er
1-3-5 Parameter Display Mode 1) How to Change Mode Press and hold down “UP” and “DOWN” keys together in the Clock Display Mode to show the Block out Time Setting Mode. Press Enter key twice to switch to the Parameter Display Mode. “no.00” will be displayed when the mode is switched over. 2) How to Check Parameters In the Parameter Display Mode, the display shows “no.**” and “****” repeatedly by turns. (“*” should be a number on the actual panel.
1-3-6 Drive Setting Mode 1) How to Change Mode Press and hold down “UP” and “DOWN” keys together in the Clock Display Mode to show the Block out Time Setting Mode. Press Enter key three times to switch to the Drive Setting Mode. Once the mode has switched, the display shows either “d_on” or “d_oF” which corresponds the current setting. Also, when the drive setting is On Mode, LED is lighted in green. 2) How to Set to Driving Mode Press “UP” key to change the setting to On Mode.
1-3-8 Pump Remote Operation Mode 1) How to Change Mode Press and hold down “UP” and “DOWN” keys together in the Clock Display Mode to show the Block out Time Setting Mode. Press Enter key five times to switch to the Pump Remote Operation Mode. The display shows “PuoF” once the mode has switched. 2) How to Start Compulsory Pump Operation Press “UP” key to start the water circulation pump operation compulsorily. By pressing the key, the display turns to ”Puon”.
11. Water Supply Quality Chloride and pH In high chloride water supply areas, the water can corrode some parts and cause them to fail. Where the chloride level exceeds 200 mg/litre warranty does not apply to the heat pump unit and tank unit. pH is a measure of whether the water is alkaline or acid. In an acidic water supply, the water can attack the parts and cause them to fail. No warranty applies to the heat pump unit and tank unit where the pH is less than 6.0.
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