Z series combination household (townhouse)central air conditioning unit
9
Common error
Reason
Solution
1. Compressor doesn’t work.
A. Error on power
B. Wire loose
C. Error on relay or insurance
D. Temp. is set too high
E. Error on compressor
●Check and re-tighten
●Check error reason and repair
●Reset
●Replace compressor
2. Fan noise is large
A. Fixing bolt of fan is loose
B. Fan louver touches outer case
or net cover
C. Operation of fan is unstable
●Retighten fan fixing bolt
●Check reason and adjust
●Replace the fan
3.Compressor noise is high
A. Liquid hammer produced for
liquid refrigerant flows in
compressor
B. Components inside compressor
are damaged.
●Check if expand valve is
ineffective, temp. sensor
is loose, and repair
●Replace compressor
4. Water pump doesn’t
operate or operates
abnormally
A. Error of power or wiring
B. Error of relay
C. Gas exists in water pipe
●Check out the reason and repair
●Replace relay
●Exhaust all gas
5. Cooling effect is bad.
A. Freon in cooling system leaks
B. Heat preservation of water
pipe is bad.
C. Water flow quantity is not enough
D. Heavy dust on condenser
E. Cooling system is blocked
●Check and repair or recharge
Freon.
●Strengthen heat preservation
●Clean water filter
●Clean condenser
●Check or replace dry filter
6. ompressor frequently is on
and off.
A. Too much refrigerant
B. Circulation of water system is bad
C. Low load
●Discharge some refrigerant
●Water system is blocked or there is
air.Check water pump, valve, pipeline,
clean water filter or exhaust air.
●Adjust load or increase energy store
facility.
7. Refrigerate system low-
pressure switch on/off is
working frequently.
A. Freon leakage on system and
refrigerant shortage.
B. Dry filter is blocked
C. Error on heat expand valve.
D.Water system circulation is bad
●Check and repair and recharge
refrigerant.
●Change dry filter
●Check if expanse valve is blocked,
temp. sensor is leaking, then repair or
8. ompressor
A. All refrigerant is leaked
.
B. Casing evaporator is freeze.
C.Compressor error
●Check, repair o r charge refrigerant
●Check, reason and remove freezing
●Replace compressor
