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TROUBLE SHOOTING GUIDE
Following the procedure below to check if the oven is defective or not.
1. Check grounding before trouble checking.
2. Be careful of the high voltage circuit.
3. Discharge the high voltage capacitor.
4. When checking the continuity of the switches, fuse or high voltage transformer, disconnect one lead wire from these parts
and check continuity with the AC plug removed. To do otherwise may result in a false reading or damage to your meter.
NOTE : When electric parts are checked, be sure the power cord is not inserted the wall outlet.
Check wire harness, wiring and connected of the terminals and power cord before check the parts listed
below.
(TROUBLE 1) Oven does not operate at all ; any inputs can not be accepted.
Condition
Fuse blows
Check
Check continuity of inter-
lock monitor switch
with door closed
(COM
NC)
Check continuity of pri-
mary interlock switch con-
tact with door partially
open until interlock moni-
tor switch contact close
Check continuity of pri-
mary interlock switch con-
tact with door partially
open until interlock moni-
tor switch contact close
(COM
NO)
Check continuity of
primary winding of low
voltage transformer
Disconnect high voltage
fuse and operate the unit
Result
Malfunction of
interlock
Continuity
monitor switch
No
Continuity
No
Shorted contacts
Continuity
of primary interlock
switch
Continuity
Continuity
Shorted contacts of
primary interlock
switch.
0 Ω or
Defective low volt-
infinite
age transformer
Approx.
490Ω
(normal)
Fuse again
Defective high
blows
voltage transformer
17
Cause
Remedy
Replace
NOTE
Replace
NOTE
Replace
NOTE
Replace
Replace
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