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Malfunctions
A.
Compressor does
B.
not start up
C.
D.
A. Fixing bolt of fan is loose
B.
High noise of fan
C.
A.
High noise of
compressor
B.
A.
Water pump does
not run or runs
B.
abnormally
C. There is air in water pipe
A.
Compressor starts
B.
or stops frequently
C. Low load
The unit does not
A.
heat although
B.
compressor is
running
A. Poor heat insulation of water
system
B. Poor heat exchange of
Poor efficiency of
evaporator
hot water heating
C. Poor refrigerant of unit
D. Blockage of heat exchanger
at water side
AIR-TO-WATER HEAT PUMP INSTALLATION MANUAL
Troubleshooting
Reasons
Power
supply
has
problem
Connection wire is loose.
Malfunction of mainboard
Malfunction of
compressor
Fan blade touches shell or
grill
Operation
of
fan
unreliable
Liquid slugging happens
when
liquid
refrigerant
enters into compressor
Internal
parts
compressor are broken
Malfunction
of
power
supply or terminal
Malfunction of relay
Poor or excess refrigerant
Poor circulation of water
system
Leakage of refrigerant
Malfunction
compressor
55
Troubleshooting
Phase sequence is reverse
Check out and re-fix
Find out the reasons and repair.
Replace compressor
Re-fix fixing bolt of fan
Find out the reasons and adjust
is
Replace fan
Check if expansion valve is failure and
temp. sensor is loose .If that, repair it.
in
Replace compressor
Find out the reasons and repair
Replace relay
Evacuate
Discharge or add part of refrigerant
Water system is blocked or there is air in
it. Check water pump, valve and pipeline.
Clean water filter or evacuate
Adjust the load or add accumulating
devices.
Repair by leakage detection and add
of
refrigerant
Replace compressor
Enhance heat insulation efficiency of the
system
Check if air in or out of unit is normal and
clean evaporator of the unit
Check if refrigerant of unit leaks
Clean or replace heat exchanger.
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