Test 7 Gas Valve Test - Gas Model - LG DLEX0001TM Service Manual

Test 7
GAS Valve test - Gas Type
Caution
Trouble Symptom
Measurement Condition
Valve 1
Igniter
Valve 2
NOTE: When the gas valve operates after disassembling, ignition will be off several seconds.
It is normal because there is no circulation of air.
When measuring power, be sure to wear insulated gloves, to avoid electric shock.
While operating, Heating will not work.
Drying time takes longer.
With dryer power on
Power On & Start (Normal Cycle)
When measuring Valve 1 voltage,
More than DC 90V?
Igniter operates?
(after 1 min, Igniter becomes reddish)
When measuring Valve 2 voltage, Value is more
than DC 90V? (10 sec after Igniter off)
When measuring terminal resistance on Valve 1 and
Valve 2, Valves are more than1.5 ~ 2.5kΩ?
(Measure after Off )
If "Valve 1 " and "Valve 2" are under DC 10V, Valves
are Off?
• Harness check
• Controller change
NO
YES
YES
NO
NO
YES
34
• Check thermostat
NO
Hi limit Safety
• Check Igniter &
NO
Frame detect
• Check Gas
YES connection or
Gas supply
YES
• Change Valve
NO
• Change Valve