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5. Troubleshooting
5.1.
Troubleshooting for common faults
Failure
Reason
Solution
Heat pump does not run
No power
Wait until the power recovers
Power switch is off
Switch on the power
Fuse burned
Check and change the fuse
The breaker is off
Check and turn of the breaker
Fan running but insufficient
heating
Evaporator is blocked
Remove the obstacles
Air outlet blocked
Remove the obstacles
3-minute start delay
Wait patiently
Waterflow is too high
Lower waterflow (e.g. with a
bypass)
Display normal but no
heating
Set temperature is too low
Set proper heating temperature
3-minute start delay
Wait patiently
If the above solutions do not work, please contact the dealer with detailed information and your
model number. Do not try to repair the heat pump yourself.
Note:
if the following conditions happen, please stop the machine immediately and cut off the power supply
immediately, then contact your dealer:
4. Inaccurate switch action
5. The fuse is frequently broken, or the leakage circuit breaker jumped.
5.2.
Error codes
Error code Failure description
PP1
Water inlet temperature sensor failure
PP2
Failure for the sensor to connect AIN2 terminal on PC board
PP3
Failure for the sensor to connect AIN3terminal on PC board
PP4
Gas return temperature sensor failure
PP5
Air temperature sensor failure
PP7
Low ambient temperature protection
EE1
High pressure protection
EE2
Low pressure protection
EE3
Water flow switch failure