Grundig GHP-MM08, Service Manual

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Heat Pump Monobloc Inverter / User Manual
39 Heat Pump Space Heater 202202
4.4 Troubleshooting
4.4.1 Warning
!
Improper installation or attachment of equipment or accessories could result in electric
shock, short-circuit, leaks, fires or other damage to the unit.
!
All electrical works must be carried out by competent and suitably qualified, certified
and accredited professionals and in accordance with all applicable legislation (all
national, local and other laws, standards, codes, rules, regulations and other legislation
that apply in a given situation).
!
If unsure of installation procedures or use, always contact your dealer for advice and
information.
4.4.2 P01 diagnosis and analysis
4.4.2.1 Diagnosis
Code P01 means heat pump tripped with the open of the contactor of water flow switch
installed on the port TS1 of hydraulic module PCB with too low water flow rate. When code
P01 occurs three times within half an hour, a manual power-off must be done before heat
pump can resume next restart.
4.4.2.2 Possible causes
!
Water flow switch wiring is loose or open.
!
Water flow rate is too low.
!
The components, such as water flow switch, water pump and hydraulic module PCB,
are damaged.