KeepRite DLCCAR Service Manual - page 54
54
328 080000 01
Specifications subject to change without notice.
TROUBLESHOOTING (CONT)
Table 28—Air Conditioner can not start up
POSSIBLE CAUSES
DISCRIMINATING METHOD
(Air Conditioner Status)
TROUBLESHOOTING
No power supply or poor connection for power
plug
After energizer, operation indicator is not bright
and the buzzer can not give out sound.
Confirm whether it's due to power failure. If yes,
wait for power recovery. If not, check power
supply circuit and ensure the power plug is
connected well.
Wrong wire connection between indoor unit and
the outdoor unit, or poor connection for wiring
terminals.
Under normal power supply circumstances,
operation indicator is not bright after energization
Check the circuit according to the circuit diagram
and connect wires correctly. Ensure all wiring
terminals are connected firmly.
Electric leakage from air conditioner
After energization, room circuit breaker trips off at
once.
Ensure the air conditioner is ground reliably.
Ensure wires of the air conditioner are
connected correctly. Check the wiring inside the
air conditioners. Check whether the insulation
layer of power cord is damaged; if yes replace
the power cord.
Model selection for air switch is improper
After energization air switch trips off
Select proper air switch
Malfunction of remote controller
After energization, operation indicator is bright
while no display on remote controller or buttons
have no action.
Replace batters for remote controller Repair or
replace remote controller
Table 29—Poor Cooling (Heating) for Air Conditioner
POSSIBLE CAUSES
DISCRIMINATING METHOD
(Air Conditioner Status)
TROUBLESHOOTING
Set temperature is improper
Observe the set temperature on remote controller
Adjust the set temperature
Rotation speed of the IDU fan motor is set too low
Small wind blow
Set the fan speed at high or medium
Filter of indoor unit is blocked
Check the filter to see if its blocked
Clean the filter
Installation position for the indoor and outdoor
units is improper
Check whether the installation position is correct
according to installation requirements for air
conditioner.
Adjust the installation position and install the
rainproof and sun proof for the outdoor unit
Refrigerant is leaking
Discharged air temperature during cooling is
higher than normal discharged wind temperature.
Discharged air temperature during heating is lower
than normal discharged wind temperature. Unit's
pressure is much lower than regulated range.
Find the leakage causes and repair them. Add
refrigerant.
Malfunction of 4-way valve
Blow cold wind during heating
Replace the 4-way valve
Malfunction of capillary
Discharged air temperature during cooling is
higher than normal discharged wind temperature.
Discharged air temperature during heating is lower
than normal discharged wind temperature. The
unit pressure is much lower than regulated range.
If refrigerant is not leaking, part of capillary is
blocked.
Replace the capillary
Flow volume is insufficient
The pressure of valves is much lower than that
stated in the specification
Open the valve completely
Malfunction of horizontal louver
Horizontal louver can not swing
Refer to point 3 of maintenance method for details
Malfunction of the IDU fan motor
The IDU fan motor can not operate
Refer to troubleshooting for H6 for maintenance
method in details
Malfunction of the ODU fan motor
The ODU fan motor can not operate
Refer to point 4 of maintenance method for details
Malfunction of compressor
Compressor can not operate
Refer to point 5 of maintenance method for details
Table 30—Horizontal Louver can not swing
POSSIBLE CAUSES
DISCRIMINATING METHOD
(Air Conditioner Status)
TROUBLESHOOTING
Wrong wire connection, or poor connection
Check the wiring status according to the circuit
diagram
Connect wires according to the wiring diagram to
ensure all wiring terminals are connected firmly
Stepping motor is damaged
Stepping motor cannot operate
Repair or replace stepping motor
Main board is damaged
Others are all normal while horizontal lover can not
operate
Replace the main board with the same model