ACP RFS12MPSB Service Manual page 11

Troubleshooting Procedures
Trouble 2: Oven does not operate at all, Display window does not display any figures,
and no input is accepted.
CONDITION
1. Fuse blows.
2. Fuse does not
blow.
©2010 ACP, Inc.
CHECK
Check continuity
Continuity.
of monitor
switch (with
door closed).
No continuity.
Replace fuse
Check continuity
Continuity.
of primary
switch (with
door opened).
No continuity.
Check continuity
Continuity.
of secondary
switch (with
door opened).
No continuity.
Disconnect one
Fuse blows again
side of the wire
lead connected
from transformer
to the high voltage Normal.
capacitor and
operate the unit.
Measure to
Normal.
resistance high
voltage capacitor
(refer to page 16)
Abnormal.
No continuity.
Check continuity
of oven TCO.
Continuity.
Check continuity
No continuity.
of power supply
cord.
16400007 Rev. 0
RESULT CAUSE
Malfunction of the
monitor switch.
Shorted contact at
the primary switch.
Malfunction of
secondary switch.
Defective high volt-
age transformer.
Defective high
voltage capacitor.
Defective
oven TCO.
Defective power
supply cord.
REMEDY
Replace fuse,
interlock assembly
Replace fuse,
interlock assembly
Replace fuse,
interlock assembly
Replace high volt-
age transformer.
Set is good condition
(defective fuse only)
Replace high
voltage capacitor.
Replace
oven TCO.
Replace power
supply cord.
11