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4. Troubleshooting
4-2 Electrical Malfunction
Safety error
L1
(Black)
L1
(Black)
N
(White)
N
(White)
L2
(Red)
L2
(Red)
(Terminal Block)
(Terminal Block)
*Thermostat open check. (150°c / 0°c )
No
Yes
Yes
Yes
*Check terminal block voltage.
AC 240V/120V or AC208V/120V
*Check the pin voltage of connector
(CN01) on Main PCB.
(Input voltage : 120V)
*
Check the Low voltage Transformer
Yes
No
No
No power
or
No display
* Reset the sirsuit breaker
or check main power.
**Reconnect and replace or
repair harness is damaged
Check whether varistor(ZNR1) on
main PCB has been damaged.
* replace Thermostat.
* replace Main PCB.
END
Thermostat
(150/0)
Thermostat
(150/0)
L1
L2 : 240V
L1
N : 120V
L2
N : 120V
END
IC03(7805)
IC03(7805)
Low Voltage Transformer
Low Voltage Transformer
IC02(7812)
IC02(7812)
ZNR1
(Varistor)
ZNR1
(Varistor)
Connector
CN07(AC 120V)
Connector
CN07(AC 120V)