Grundig GHP-MM08, Руководство по обслуживанию

Страница: 56 / 83

56 / EN
Heat Pump Monobloc Inverter / User Manual
202202 Heat Pump Space Heater 54
4.4.12 P13 diagnosis and analysis
4.4.12.1 Diagnosis
When heat pump operates in heating or DHW mode, if “the inlet water temperature TA is
higher than the outlet water temperature TB” is detected for 60 seconds, the heat pump will stop
but the interface doesn’t display the code P13. After 3 minutes, heat pump will restart. If such
“stop first and then restart” happened three times in succession, heat pump will trip and locked,
the interface will display the code P13. A manual power-off must be done before next restart.
4.4.12.2 Possible causes
!
The system is lack of refrigerant.
!
The body of 4-way valve is locked.
!
The coil of 4-way valve malfunctioned.
!
4-way valve is powered off.
!
Refrigerant system PCB is damaged.
4.4.12.3 Analysis and action
The system is lack of refrigerant?
P13
Yes
Fix the leakages and recharge
refrigerant
NO
The body of 4-way valve is locked?
Yes
Remove dirt and clogs or tap the
valve body gently with wooden
hammer until the valve can be
reversed
The coil of 4-way valve has a short or open
circuit?
Replace the valve coil
Yes
NO
4-way valve is powered off?
Ensure the operation mode is right:
in cooling mode the valve is
power-off, in heating or DHW
mode, the valve is power-on
Yes
NO
NO
Replace refrigerant system PCB