Coway CHP-06EL, Service Manual

Page: 33 / 82

Fault diagnosis
Coway co., Ltd 5-1
5. Fault diagnosis
5-1 Checking faults by symptoms
5-1-1 Fault diagnosis

Power supply fault
Y
The operation
part and indication part are
not turned on.
If the voltage is 187V or
lower, it is a power supply
defect.
Is the power
rating of the electrical outlet
normal?
N
Power supply fault
Y
Is the main
PCB input voltage AC
220V?
N
Is the
contact between
the power cord and the electrical
wiring normal?
Check the household
power supply.
The power supply is
irregular or 0V.
Check the distribution
contacts of the electrical
outlet and check whether
the power supply is cut off.
Y
Is the main
PCB fuse blown off?
N
Is the
connection of the main
PCB connector normal?
Power connector
connection fault.
N
Fit the connector
correctly.
The fuse is blown off.
Y
Check the main PCB fuse
and replace it if
necessary.
Main PCB connector
connection fault.
N
Check the main PCB and
replace it if necessary.
Y
Y
Is the FND
connection cable open?
FND cable
connection fault.
Y
Check the FND cable and
replace it if necessary.
N
Is the
voltage of the PCB micom
DC 5V?
PCB power circuit defect.
N
Check the main PCB and
replace it if necessary.
CHP-06EL-eng.indb 1 2007-10-19 ｿﾀﾈﾄ 1:04:28