Grundig GHPH-MM08 Manuel D'utilisation page 109

13 Trouble shooting
Fault
Fault name
number
Anti-freezing
P06 protection of
leaving water
Anti-freezing
P07 protection of
condenser pipe
Middle pressure
P08
protection
Low pressure
P10
sensorprotection
P11 DC fan 1 failure
P13 4-way valve fault
Heat Pump Monobloc Inverter / User Manual
Failure analysis
1. Water flow is too low.
2. Heat-exchanger is blocked.
3. Y shape filter in water
system is blocked.
4. Load is too low.
1. Lack of refrigerant.
2. Water circuit system is
blocked.
3. Refrigerant system is
blocked.
Middle pressure switch off
1. Lack of refrigerant;
2. The refrigeration system is
blocked;
3. Exceeding the scope of
system work.
1. The fan is faulty or stuck;
2. The main control board is
faulty
1. Entering/leaving water
temperature sensors are
reversely inserted.
2. 4-way valve is fault.
3. PCB is fault.
Diagnosis method
1. Check whether there is some
air in water circuit system.
2. Check whether the heat-
exchanger is blocked.
3. Check whether the Y shape
filter is blocked.
4. Check whether the water
circuit system is reasonable.
1. Check for leaks in the system;
2. Check whether Y shape filter
is blocked.
3. Check whether filter in
refrigerant system is blocked.
Check whether the middle
pressure switch is open circuit,
when turn off the unit.
1. Check whether the system is
leaking;
2. Check if the filter net is
blocked;
3. Check whether the ambient
temperature or water
temperature exceeds the limit.
1. Check whether the fan is
stuck, or replace with a new
fan;
2. Replace the main control
board
1. Check whether the entering
and leaving temperature
sensors are reversely inserted.
2. Check whether action of
4-way valve is normal.
3. Check whether the sample
temperature of motherboard
is accurate
Solution
1. If there is a problem
with the drain valve,
replace it with a new
one;
2. Blow the plate heat
exchanger with water
or high-pressure gas in
the opposite direction
for cleaning;
3. Clean the filter;
4. The water circulation
system must have a
shunt.
1. Repair the leakage
point.
2. Clean the filter.
3. Replace the filterr
Replace the middle
pressure switch.
1. Repair the leak and
refill the refrigerant;
2. Replace the filter;
3. Exceed the system
working limit, can't run
1. Check if the fan is
stuck, or replace with a
new fan;
2. Replace the main
control board
1. Correct the wrong
place;
2. Try to switch
repeatedly to see if it
works, if not, replace it;
3. If it is wrong, replace it;
109 / 276 EN