Circulating Air Source Heat Pump Water Heater
24
will defrost periodically.
2
)
As for operating the unit at those regions whose temperature is lower than 0
℃
in winter: when
the system is at standby status, and ambient temperature and water temperature of system is at 0
℃
, in
order to prevent water system icing up and damaging equipments, the control system will operate at
freeze prevention condition. Start up water pump and compressor until the water temperature reaches to
safety point.
3
)
If the ambient temperature during operation is high, the fan may operate at low fan speed.
4
)
If start up the unit or turning on the manual switch immediately after stopping operation, the unit
won’t operate within 3min, which is the delay protection for the compressor.
5
)
During defrosting operation, the fan motor of the unit stops operation.
6
)
Under normal working condition of generating hot water, the 4-way valve is at de-enegization
status.
7
)
The water outlet temperature under low temperature can’t reach the set temperature. Under the
low ambient temperature, for protecting the unit, the water outlet temperature may can’t reach high set
temperature, which is the normal phenomenon.
(
2
)
Professional technicians can refer to below troubleshooting table for resolving malfunctions:
Common malfunction
Causes
Troubleshooting
Compressor can’t be
started up
①
There’s problem for the power.
②
Wire connection is loose
③
Malfunction of relay or fuse
④
Set temperature is high
⑤
Malfunction of compressor
①
Check the phase sequence .
②
Check it and connect it tightly.
③
Check the malfunction causes and
resolve it.
④
Set it again
⑤
Replace compressor.
Big noise for fan
①
The fixing bolt for the fan is loose.
②
Blades touch outer case or grille.
③
The fan can’t operate placidly.
①
Tighten the fixing bolts of fan.
②
Check it and adjust it.
③
Replace the fan.
Big noise for the
compressor
①
There’s liquid slugging when liquid
refrigerant entering into compressor.
②
There’s damaged parts inside the
compressor.
①
Check whether the expansion valve is
valid and whether the temperature is loose.
②
Replace compressor.
Water pump can’t
operate or the
operation is abnormal
①
Power malfunction of wiring
malfunction.
②
Malfunction of relay
②
There’s air inside the water pipe .
①
Find out the reason and repair it.
②
Replace relay .
③
Discharge the air completely.
Compressor is turned
on or turned off
frequently
①
Refrigerant is superfluous or too
less.
②
Poor circulation for the water
system.
③
Low load.
①
Add or release some refrigerant.
②
The water system is blocked or there’s
air inside the water system. Please check
water pump, valve and pipeline, clean the
strainer or discharge air.
③
Adjust the load or add energy-storage
device.
Compressor operates,
while the unit can’t
heat
①
All refrigerant are leaked.
②
Malfunction of compressor.
①
Repair it and complement refrigerant.
②
Replace compressor.
The hot water
generation effect is not
obvious.
①
The thermal insulation for the
water system is poor.
②
The heat-exchanging effect for the
evaporator is poor.
②
Refrigerant is insufficient.
①
Enforce the thermal insulation for the
system.
②
Check whether air inlet and air outlet for
the unit is normal and clean the evaporator.
③
Check whether there’s refrigerant
leakage for the unit, and add some
refrigerant.
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