Grundig GHP-MM08, Руководство по обслуживанию

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49 / EN
Heat Pump Monobloc Inverter / User Manual
47 Heat Pump Space Heater 202202
4.4.6.3 Analysis and action
Notes:
1. Measure sensor resistance. If the resistance is too low, the sensor has short-circuited. If
the resistance is not consistent with the sensor’s resistance characteristic table, the sensor has
failed. Refer to Part 4, 4-5.1 “Temperature Sensor Resistance Characteristics”.
2. Check air or water side heat exchanger, the fan and air outlets for dirt and blockages.
3. High pressure side blockage causes discharge temperature to be higher than normal,
discharge pressure to be higher than normal and suction pressure to be lower than normal.
4. Check the water side heat exchanger, water piping, circulator pumps and water flow
switch for dirt and blockages.
P05
Temperature sensors TP, TA, TW are loose,
short or open circuit or damaged?
1
Yes
Ensure these temperature
sensors are connected properly
or replace them
NO
High pressure switch HP1 connection on
refrigerant system PCB is loose, short or
open circuit or damaged?
Yes
Ensure the pressure switch is
connected properly or replace it
NO
There is poor heat transfer on the air or
water side heat exchangers? 2
Check the heat exchangers
carefully, remove dirt and
blockages
Yes
NO
The high pressure side is blocked, caused by
crushed or bent pipe or blocked EEV? 3
Inspect the system and fix the
error
Yes
NO
The water flow rate is not sufficient in
Cooling mode?
4
Inspect the system and fix the
error
Hydraulic module PCB is damaged?
NO
Yes
Yes
Replace hydraulic module PCB
Replaced refrigerant system PCB
NO