![Page 1: Daikin Altherma™ Troubling Shooting. 2 Code: 81 Part: Outlet water thermistor Location: Activation failure: Possible action to resolve the problem: –Check](https://reader036.vdocuments.us/reader036/viewer/2022062313/56649c7b5503460f9492f00b/html5/thumbnails/1.jpg)
Daikin Altherma™ Troubling Shooting
![Page 2: Daikin Altherma™ Troubling Shooting. 2 Code: 81 Part: Outlet water thermistor Location: Activation failure: Possible action to resolve the problem: –Check](https://reader036.vdocuments.us/reader036/viewer/2022062313/56649c7b5503460f9492f00b/html5/thumbnails/2.jpg)
2
• Code: 81
• Part: Outlet water thermistor
• Location:
• Activation failure:
• Possible action to resolve the problem:
– Check connector– Check resitance value– Replace thermistor
Outlet thermistor failure
R3T
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3
Freeze up problem
• Code: 89
• Part: Heat exchanger freez-up
• Activation failure: Outlet water temp. too low
• Location:
• Possible action to resolve the problem:
– Check water flow in the system. Minimum water flow system 9liter / min.
R3T
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5
Flow failure
• Code: 7H• Part: Flow failure• Location:• Activation failure: Flow switch
open during operation (no signal)• Possible action to resolve the
problem:– Check water flow in the system.
(Minimum water flow system 20liter / min.)– Check water pressure in the
installation. (Minimum 0.3 bar)– Check shutt OFF valves– Is water system purged– Check pressure drop and speed of
the waterpump– Check pump operation
R3T
![Page 5: Daikin Altherma™ Troubling Shooting. 2 Code: 81 Part: Outlet water thermistor Location: Activation failure: Possible action to resolve the problem: –Check](https://reader036.vdocuments.us/reader036/viewer/2022062313/56649c7b5503460f9492f00b/html5/thumbnails/5.jpg)
6
Outlet water temperture too high
• Code: 8H
• Part: Outlet water thermistor
• Location: Outlet back up heater
• Activation failure: If outlet water > 65°C
• Possible action to resolve the problem:
– Check if contactor(s) back up heater is not welded
– Check if thermistor is not damaged
– Check if correct resistor value of thermistor
• Procedure :Refer to service manual
R3T
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7
Indoor PCB failure
• Code: A1
• Part: Indoor PCB
• Location: Switchbox
• Activation failure:
• Possible action to resolve the problem:
– Replace PCB
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8
Insufficient cooling or heating
• Code: A5• Part: Liquid sensor hydrobox• Location: • Possible action to resolve the problem:
– Check water flow in the system. (Minimum water flow system
9liter / min.)– Check water pressure in the
installation. (Minimum 0.3 bar)– Check shutt OFF valves– Is water system purged– Check pressure drop and speed of the
waterpump– Check refrigerant charge– Check thermistor
• Procedure: refer to service manual R3T
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9
Booster heater thermal protector
• Code: AA• Part: Thermal protector
booster heater or back up heater *
• Location: • Possible action to resolve
the problem:– Check if thermal protection is not
damaged.– Check contactor of the electric
BUH / BSH
![Page 9: Daikin Altherma™ Troubling Shooting. 2 Code: 81 Part: Outlet water thermistor Location: Activation failure: Possible action to resolve the problem: –Check](https://reader036.vdocuments.us/reader036/viewer/2022062313/56649c7b5503460f9492f00b/html5/thumbnails/9.jpg)
10
Stucked flow switch
• Code: CO
• Part: Flow switch failure
• Activation failure: Flow swith remains closed when pump is not operating
• Location:
• Possible action to resolve the problem:
– Check for dirt in flow switch– Replace part is required
R3T
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11
Heat exchanger thermistor failure
• Code: C4
• Part: Liquid sensor
• Activation failure: Sensor broken or out of range
• Location:
• Possible action to resolve the problem:
– Check connector– Check resistance of the sensor– Procedure: refer to servicemanual
for procedure– If damaged replace part
R3T
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12
Outdoor PCB failure
• Code: E1
• Part: Outdoor PCB failure
• Activation failure:
• Location:
• Possible action to resolve the problem:
– Out of control of CPU• Voltage drop
• Power loss
• Noise on power supply
– Defect outdoor PCB
![Page 12: Daikin Altherma™ Troubling Shooting. 2 Code: 81 Part: Outlet water thermistor Location: Activation failure: Possible action to resolve the problem: –Check](https://reader036.vdocuments.us/reader036/viewer/2022062313/56649c7b5503460f9492f00b/html5/thumbnails/12.jpg)
13
Overload activation of compressor
• Code: E5
• Part: Overload protector compressor
• Activation failure: Failure If overload protector ( >130°C) is activated twice in one hour
• Location: Outdoor unit
• Possible action to resolve the problem:
– Refrigerant shortage.– Malfunction four way valve.– Outdoor PCB failure.– Electronic expansion valve
defective.
![Page 13: Daikin Altherma™ Troubling Shooting. 2 Code: 81 Part: Outlet water thermistor Location: Activation failure: Possible action to resolve the problem: –Check](https://reader036.vdocuments.us/reader036/viewer/2022062313/56649c7b5503460f9492f00b/html5/thumbnails/13.jpg)
14
Compressor start up failure
• Code: E6
• Part: Compressor locked
• Activation failure: : Failure, if error occurs 16 times, counter reset if compressor runs normal for 5 minutes
• Location: Outdoor unit
• Possible action to resolve the problem:
– Replace outdoor PCB– Replace compressor
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15
Fan motor failure
• Code: E7
• Part: Outdoor fan motor
• Activation failure: Failure, if error occurs 16 times, counter reset if compressor runs normal for 5 minutes
• Location: Outdoor unit
• Possible action to resolve the problem:
– Fan motor breakdown– Bad contact between PCB and fan
motor– Blockage of the fan blades
![Page 15: Daikin Altherma™ Troubling Shooting. 2 Code: 81 Part: Outlet water thermistor Location: Activation failure: Possible action to resolve the problem: –Check](https://reader036.vdocuments.us/reader036/viewer/2022062313/56649c7b5503460f9492f00b/html5/thumbnails/15.jpg)
18
Sanitary water too high
• Code: EC• Part: Sanitary tank temperature• Activation failure: If temperature
sanitary water > 89°C• Location: Sensor inside sanitary
tank• Possible action to resolve the
problem:– Check position of sensor in socket– Check if contactor(s) booster heater is
not welded– Check if thermistor is not damaged– Check if correct resistor value of
thermistor
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19
Discharge temperature too high
• Code: F3
• Part: Discharge sensor
• Activation failure: Failure if discharge temperature > 120°C for 6 times
• Location: Sensor located on the discharge pipe of compressor
• Possible action to resolve the problem:
– Refrigerant shortage.– Malfunction four way valve.– Defective discharge sensor.– Defective EEV driver.
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22
Voltage and current sensor failure
• Code: H0
• Part: Voltage / Current sensor
• Activation failure:
No measurement of current during compressor operation.
• Possible action to resolve the problem:
– Reactor disconnected– Compressor disconnection– Outdoor PCB failure– Compressor defective
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25
Outdoor ambient thermistor
• Code: H9
• Part: Thermistor
• Location
• Activation failure: Resistance value out of range
• Possible action to resolve the problem:
– Check connector– Check resistance value– Replace thermistor.– Outdoor PCB
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Discharge pipe thermistor
• Code: J3
• Part: Discharge pipe thermistor
• Location
• Activation failure: Resistance value out of range
• Possible action to resolve the problem:
– Check connector– Check resistance value– Replace thermistor.– Outdoor PCB
![Page 20: Daikin Altherma™ Troubling Shooting. 2 Code: 81 Part: Outlet water thermistor Location: Activation failure: Possible action to resolve the problem: –Check](https://reader036.vdocuments.us/reader036/viewer/2022062313/56649c7b5503460f9492f00b/html5/thumbnails/20.jpg)
27
Outdoor heat exchanger
• Code: J6
• Part: Thermistor
• Location
• Activation failure: Resistance value out of range
• Possible action to resolve the problem:
– Check connector– Check resistance value– Replace thermistor.– Outdoor PCB
![Page 21: Daikin Altherma™ Troubling Shooting. 2 Code: 81 Part: Outlet water thermistor Location: Activation failure: Possible action to resolve the problem: –Check](https://reader036.vdocuments.us/reader036/viewer/2022062313/56649c7b5503460f9492f00b/html5/thumbnails/21.jpg)
29
Electrical box temperature rise
• Code: L3
• Part: Radiation fin thermistor
• Location: Outdoor PCB
• Activation failure: failure if temperature > 85°C and compressor OFF
• Possible action to resolve the problem:
– Defective outdoor fan– Defective Fin thermistor– Defective Outdoor PCB– Heat conductive paste
![Page 22: Daikin Altherma™ Troubling Shooting. 2 Code: 81 Part: Outlet water thermistor Location: Activation failure: Possible action to resolve the problem: –Check](https://reader036.vdocuments.us/reader036/viewer/2022062313/56649c7b5503460f9492f00b/html5/thumbnails/22.jpg)
30
Radiation fin temperature rise
• Code: L4
• Part: Radiation fin temperature rise
• Location: Outdoor PCB
• Activation failure: failure if temperature > 105°C and compressor ON for 4 times
• Possible action to resolve the problem:– Defective outdoor fan– Defective Fin thermistor– Defective Outdoor PCB– Heat conductive paste
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Thank you for your attention!