ACP MenuMaster RFS Subway, Service Training Manual

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26
Troubleshooting
CONDITION CHECK RESULT CAUSE REMEDY
1. Fuse blows. Continuity.
No continuity.
Continuity.
Shorted contact at
the primary switch.
No continuity.
Fuse blows again
Defective high volt-
age transformer.
Replace high volt-
age transformer.
Normal.
Defective high
voltage capacitor.
Replace high
voltage capacitor.
Malfunction of the
monitor switch.
Replace fuse,
interlock assembly
Check continuity
of monitor
switch (with
door closed).
Check continuity
of primary
switch (with
door opened).
Disconnect one
side of the wire
lead connected
from transformer
to the high voltage
capacitor and
operate the unit.
Replace fuse
Continuity.
Malfunction of
secondary switch.
No continuity.
Check continuity
of secondary
switch (with
door opened).
Normal.
Set is good condition
(defective fuse only)
Abnormal.
Measure to
resistance high
voltage capacitor
(refer to page 20)
2. Fuse does not
blow.
No continuity.
No continuity.
Replace power
supply cord.
Defective
oven TCO.
Defective power
supply cord.
Replace
oven TCO.
Check continuity
of oven TCO.
Check continuity
of power supply
cord.
Continuity.
Replace fuse,
interlock assembly
Replace fuse,
interlock assembly
Trouble 2: Oven does not operate at all, Display window does not display any figures,
and no input is accepted.