Service Manual
Installation and Maintenance
41
Insufficiency or leakage of refrigerant
Blockage in cooling system
Excess refrigerant
Charge excess refrigerant in the system
Low efficiency of compressor itself
Replace it with a new compressor
discharged
Condensate can not be smoothly
Clear the obstacle
During heating,electric heater does
not work
1.Connecting wire is loose 2.Fuse is off
3.Thermostator is broken 4.Electric heater is
broken parts
broken 5.Correct wire connection or replace
is running but there
is no cooling effect
(or no heating effect)
Air conditioning unit
Outdoor temperature is too high
It is available to install a shade guarding against
sun and rain..If the maximum cooling capacity
still could not ,replace the unit.
If cooling (heating) load is proper
Check the forecasted load of cooling
(heating).
The room is not properly sealed and there is
frequent passage of personnel, or when
cooling, there isheating device in the room.
Keep a proper sealing for the room and it is
recommended not to use electric appliance with
too much heating when cooling.
Check the reason and correct it.
The voltage is not stale
Fan doesn't run
during air supply
Check for the circuit with the circuit diagram
Wrong wire connection
Damage of fan capacitor
Change fan capacitor of same model and
specification
The motor winding is of broken circuit or short
circuit or the built in temperature limiter device
in open circuit due to over heat.
Replace the failed components.
Malfunction of controller
Replace the controller
The compressor is not
running (controller
with output)
Breakage of compressor capacitor or wrong
wire connection
The motor of compressor is damaged.
The compressor is jammed or blocked.
Change capacitor. And connect the circuit
diagram correctly
Knock the compressor housing with a rubber bar
or with a hammer padding with a wood, the compressor
might be shocked and run. If not, change the
compressor.
Observe the condensation condition of evaporator
orthe reading of high pressure meter to judge if
thesystem is blocked; deal with the system accordingly
Check with a multimeter if the enclosed motor
windings of compressor is with short or broken circuit
or earthing.If so,it is needed to replace it with
the same type and specifications.
Check leakage,carryout vacuum-pumping after
repairing leakageand chargerefrigerant according
to requirements.
