The Digital Tube Display "F4 - Haier HLTD500AGW Service Manual

SERVICE MANUL
Model No.HLTD500AGW

9-1-3. The Digital Tube display "F4"

Error message:Heater is abnormity .
Troubleshooting:
Check if the connecting the dryer to the
gas supply and the gas shut-off valve
is open, the gas supply accord with the
dryer's requirements.
Y
Cut off the power. check if the power
line is well and connected properly
Y
Check if the wire connecting of the
PCB is disconnection
N
Check if the wire connecting the
igniter the gas valve and the wire
unit is loose
N
Check if the ignitor is well.
Well: the resistance is about
50 - 500 and not cracked;
Broken: the resistance is infinite
or cracked
N
Check if the wire connecting the radiant
sensor the hi-limit thermostat
cycling thermostat and the wire unit
Y
Check if the radiant sensor the
hi-limit thermostat the cycling
thermostat is well.
Well: the resistance is 0 ;
Broken: the resistance is infinite.
Well
gas valve
Check if the is good.
Well
Check if the PCB is good.
Well
Check if the wire unit is good .
the
N
N
Y
Y
Broken
N
Broken
Broken
Broken
N
- 29 -
Issue
Rev.
Connecting the dryer to the gas
supply, open the shut-off valve
insure the gas supply is well.
Replace the power line
or Connect the power wire properly
Connect the wire properly
Connecting the wire properly
Replace the ignitor, insure the
exhaust system is well
Connecting the wire properly
Replace the broken part.
Replace the Back-up thermostat and
make sure wire is connected properly.
Replace the Back-up thermostat and
make sure wire is connected properly.
Replace the wire unit