Sanden GAU-A45HPA Service Book
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Sanden GAU-A45HPA Service Book

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See also: Owner's Manual , Installation Manual
Service Technical Book
GAUS 315EQTA
Tank Unit
GAU 315EQTA
Tank Unit
GAU A45HPA
GAU 315EQTA
Sanden Heat Pump –– Service Technical Book
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Summary of Contents for Sanden GAU-A45HPA

  • Page 1 Service Technical Book GAUS 315EQTA Heat Pump Unit GAU A45HPA Tank Unit GAU 315EQTA Heat Pump Unit Tank Unit GAU A45HPA GAU 315EQTA Sanden Heat Pump –– Service Technical Book Page 1 of 48...
  • Page 2 Contents PATENTS This water heater may be protected by one or more patents or registered designs in the name of Sanden Australia Pty. Ltd. TRADE MARKS ® Registered trademark of Sanden Australia Pty. Ltd. Note: Every care has been taken to ensure accuracy in preparation of this publication.

  • Page 3: Product Specifications

    1. Product Specifications *1 Ambient Temp. (Dry / Wet) 16 C / 17 C, Inlet Water Temp. 17 C, Outlet Water Temp. 65 Sanden Heat Pump –– Service Technical Book Page 3 of 48...
  • Page 4 2. Dimension Outlines Hot Water Storage Tank unit GAU-315EQTA Sanden Heat Pump –– Service Technical Book Page 4 of 48...
  • Page 5 Heat Pump Unit GAU A45HPA Sanden Heat Pump –– Service Technical Book Page 5 of 48...
  • Page 6 The refrigerant is heated by a heat exchanger that absorbs heat from the surrounding air. Heat Pump Water Heater System Heat pump unit Tank unit (hot water storage) System Circuit Diagram Sanden Heat Pump –– Service Technical Book Page 6 of 48...
  • Page 7 C at the start of water heating, HP unit runs the pump for 3min by 2.5L/min before starting to heat water. If Tank TH A > 30 C, the pump does not run before operation. Sanden Heat Pump –– Service Technical Book Page 7 of 48...
  • Page 8 Times of Retries at Error Occurrence Number of times to retry recovery when an error is detected is increased from 5 times to 7 times as a countermeasure for the electrical testing. Sanden Heat Pump –– Service Technical Book Page 8 of 48...
  • Page 9 Drain plug O RING P3 FP29 O ring for Drain plug REACTOR TSN61 Reactor for inverter Hot Water Storage Tank unit Qtty. Part Name Remarks TANK THERMISTOR Tank thermistor Sanden Heat Pump –– Service Technical Book Page 9 of 48...

  • Page 10: Main Components

    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. Sanden Heat Pump –– Service Technical Book Page 10 of 48...
  • Page 11 Terminal Block 3 x M4 Screws Timer Setting Panel Power Earth Supply 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...
  • Page 12 Hermetic motor compressor Pump type Involute scroll Motor Brushless motor Rated output 1.8 kW Insulation grade B Grade RED-WHT WHT-BLU BLU-RED Winding resistance ( at 20 1.434 1.434 1.434 Sanden Heat Pump –– Service Technical Book Page 12 of 48...
  • Page 13 Insulation resistance Terminal - Housing Rated voltage DC 12V ± 10% 0.26 A / Phase (20 ) Current 46 ± 3 (20 ) Coil resistance Insulation grade E Grade Sanden Heat Pump –– Service Technical Book Page 13 of 48...
  • Page 14 Driving power supply : Vm Driving MAX voltage Below 450V Flow variable system Variable rotation rate by PWM E Grade ( Winding temperature 115 below ) Insulation grade Fluid temperature Sanden Heat Pump –– Service Technical Book Page 14 of 48...
  • Page 15 How to Replace Propeller Fan Blade and Fan Motor How to Replace Thermistors How to Replace Expansion Valve Coil How to Replace Drain Plugs and P3 O-Rings How to Replace Reactor Sanden Heat Pump –– Service Technical Book Page 15 of 48...
  • Page 16 (5 screws) Remove Piping Cover (1 screw) Remove Terminal Block Cover . (1 screw) Unscrew Terminal Block (2 screws) Remove Case Reinforcement (PS) Remove Controller Case Cover (1 screw) Sanden Heat Pump –– Service Technical Book Page 16 of 48...
  • Page 17 Remove screws retaining the PCB (6 screws) Pull up the PCB End of Steps To put it back on, follow the same steps in back order Sanden Heat Pump –– Service Technical Book Page 17 of 48...
  • Page 18 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...
  • Page 19 See picture on the left P14 O ring End of Steps To put it back on, follow the same steps in back order Sanden Heat Pump –– Service Technical Book Page 19 of 48...
  • Page 20 (2 places) cushion gasket attached on it End of Steps To put it back on, follow the same steps in back order Sanden Heat Pump –– Service Technical Book Page 20 of 48...
  • Page 21 Discharge thermistor Water outlet thermistor (Red mark ) Defrost thermistor Copper Note: pipe The thermistor head touches the copper pipe side. Water inlet thermistor Thermistor Clip (White mark ) Sanden Heat Pump –– Service Technical Book Page 21 of 48...
  • Page 22 Pull exp. valve upwards to take it off. Take the cable connector off the PCB End of Steps To put it back on, follow the same steps in back order Sanden Heat Pump –– Service Technical Book Page 22 of 48...
  • Page 23 Take off the O ring 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...
  • Page 24 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...

  • Page 25: Error Codes

    - Resistance: (See Table-5 in p.g.12) E021 Tank Thermistor A Short When -30degC or less is detected Circuit Refer to Thermistor diagnostic White - Resistance: (See Table-5 in p.g.12) Sanden Heat Pump –– Service Technical Book Page 25 of 48...
  • Page 26 (together with PC board) (see table) - Normal: Heat pump unit - Blockage in refrigerant pipes replacement required - Heat pump unit replacement required Sanden Heat Pump –– Service Technical Book Page 26 of 48...
  • Page 27 - Check resistance between 2 - Abnormal: Valve coil replacement phases on expansion valve coil required (together with PC board) (see table) - Normal: Heat pump unit replacement required Sanden Heat Pump –– Service Technical Book Page 27 of 48...
  • Page 28 - Check resistance between 2 - Normal: PC board replacement phases on compressor required compressor malfunction - Abnormal: Heat pump unit replacement required - Heat pump unit replacement required Sanden Heat Pump –– Service Technical Book Page 28 of 48...
  • Page 29 - Power supply voltage error - Confirm power supply voltage (240+/-14V) - PC board malfunction PCB replacement required if same error occurs again after re- run of heat pump Sanden Heat Pump –– Service Technical Book Page 29 of 48...
  • Page 30 - Power supply voltage error - Confirm power supply voltage (240+/-14V) - PC board malfunction - PCB replacement required if same error occurs again after re-run of heat pump Sanden Heat Pump –– Service Technical Book Page 30 of 48...
  • Page 31 - Power supply voltage error - Confirm power supply voltage (240+/-14V) - PC board malfunction - PCB replacement required if same error occurs again after re-run of heat pump Sanden Heat Pump –– Service Technical Book Page 31 of 48...
  • Page 32 - Power supply voltage error - Confirm power supply voltage (240+/-14V) - PC board malfunction - PCB replacement required if same error occurs again after re-run of heat pump Sanden Heat Pump –– Service Technical Book Page 32 of 48...
  • Page 33 - No efficient air absorption - Check if any damege on propellar amount fan blade - Remove foreign object from evaporator if any - Fan motor malfunction - Replace fan motor Sanden Heat Pump –– Service Technical Book Page 33 of 48...
  • Page 34 - Power supply voltage error - Confirm power supply voltage (240+/-14V) - PC board malfunction - PCB replacement required if same error occurs again after re-run of heat pump Sanden Heat Pump –– Service Technical Book Page 34 of 48...
  • Page 35 Wire break or short circuit of thermistor harness Check temperature in Error in thermistor device Parameter Display Mode MCS Error Normal Error Check thermistor resistance Normal Contact error between Thermistor connector and MCS Sanden Heat Pump –– Service Technical Book Page 35 of 48...

  • Page 36: Trouble Shooting Guide

    If the system is equipped with freeze protect heaters, also do not shut the power supply to the heaters. Failure to do so may cause a crack on the pipes due to the pipes getting frozen. Sanden Heat Pump –– Service Technical Book Page 36 of 48...
  • Page 37 3 minutes. Close the tap after no air is confirmed in the water. Caution Hot water may come out. Be careful not to get the hands burnt. Sanden Heat Pump –– Service Technical Book Page 37 of 48...
  • Page 38 When no panel operation is performed for more than 60 seconds the display is switched to the Display Sleep Mode and turns off. Display Sleep Mode is cancelled when Up, Down or Enter key is pressed. Timer setting panel Sanden Heat Pump –– Service Technical Book Page 38 of 48...
  • Page 39 Clock Display Mode Hold down Drive Setting Mode Enter Enter Press Press No Operation Enter Enter Compulsory Operation Mode Enter No Operation Pump Remote Operation Mode Clock Setting Mode Sanden Heat Pump –– Service Technical Book Page 39 of 48...
  • Page 40 ‘‘00’’ (01 ~ 23) will be interpreted as a setting error and the end time will flash. Make sure to set both times to ‘‘00’’ when cancelling the block out time setting Sanden Heat Pump –– Service Technical Book Page 40 of 48...
  • Page 41 HP Defrost Thermistor detection error E047 High pressure side error E048 High ambient temperature defrost drive error E070 Fan motor locked E071 Fan motor revolution error E073 Water circulation pump locked Sanden Heat Pump –– Service Technical Book Page 41 of 48...
  • Page 42 Press and hold down ““Enter”” key to return to the Clock Display Mode. Also, it automatically goes back to the Clock Display Mode when no panel operation is performed for more than 60 seconds. Sanden Heat Pump –– Service Technical Book Page 42 of 48...
  • Page 43 Press and hold down ““Enter”” key to return to the Clock Display Mode. Also, it automatically goes back to the Clock Display Mode when no panel operation is performed for more than 60 seconds. Sanden Heat Pump –– Service Technical Book Page 43 of 48...
  • Page 44 Clock Display Mode when no panel operation is performed for more than 60 seconds. The compulsory operation command can be retained even after returning to the Clock Display Mode. Sanden Heat Pump –– Service Technical Book Page 44 of 48...
  • Page 45 Err0 -> E000 -> 0000 Error code: E000 Error occurrence time: 0000 Err9 -> E000 -> 0000 Drive Setting Mode d_on Compulsory Operation HPoF Mode Pump Remote Operation PuoF Mode Sanden Heat Pump –– Service Technical Book Page 45 of 48...
  • Page 46 Sanden Heat Pump –– Service Technical Book Page 46 of 48...

  • Page 47: Wiring Diagram

    12. Wiring Diagram Sanden Heat Pump –– Service Technical Book Page 47 of 48...
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Gau-315eqtaGaus-315eqta

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