(TROUBLE 2) Oven does not operate at all, Display window does not display any figures, and no input is accepted.
CONDITION
1. Fuse blows.
CHECK | RESULT | |
Check continuity | Continuity. | |
of monitor | ||
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switch (with |
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door closed). | No continuity. | |
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Replace fuse |
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Check continuity | Continuity. | |
of primary | ||
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switch (with |
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door opened). | No continuity. | |
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Disconnect one | Normal. | |
side of the lead | ||
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wires connected |
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from Inverter. | Fuse blows again | |
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CAUSE
Malfunction of the monitor switch.
Shorted contact at 
the primary switch.
Defective control
PCB.
Defective Inverter. 
REMEDY
Replace fuse, primary, monitor switches, and RELAY of P.C.B Assembly.
Replace fuse, primary, monitor switches, and RELAY of P.C.B Assembly.
Replace Inverter.
Replace control PCB.
NOTE : All these switches must be replaced at the same time. Refer to page 18, 19
2.Fuse does not blow.
| Check continuity |
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| No continuity. |
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| of thermostat. |
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| Continuity. |
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Check continuity 
No continuity. of power supply
cord.
Defective thermostat.
Defective power supply cord.
Replace thermostat.
Replace power supply cord.