44
DISPLAY DIAGNOSTICS
CAUTION
All repairs as described in this troubleshooting se ction are to be performed only after the caution pr ocedures one through
eight listed below have been followed.
1. Check grounding before checking for possible causes.
2. Be careful of the high voltage circuit.
3. Discharge high voltage capacitor.
4. When checking the continuity of the switches or the high voltage transformer, disconnect one lead w ire from these parts
and then check continuity with the AC plug removed. To do otherwise may result in a false reading or damage to your
meter.
5. Do not touch any parts of the circuitry on the P.C. Board circuit since static electric discharge may damage this control
panel. Always touch yourself to ground while working on this panel to discharge any static charge in y our body.
6. 208/230 VAC is present in the high voltage circuit board, power relay and primary circuit of low voltage transformer.
7. When troubleshooting, be cautious of possible el ectrical hazard.
Error Codes
During operation, the display may show the following service codes:
NOTE:
Before scheduling service for any error codes, instruct customer to unplug oven for 1 minute,
reconnect power, and retest. If unit operates properly, no service call is required.
Display
Description
Corrective Action
.
d
r
a
o
b
.
V
.
H
e
c
a
l
p
e
R
d
r
a
o
B
.
V
.
H
d
e
li
a
F
1
r
r
E
Err2
Shorted Touch Panel
Failed H.V. Board
Shorted Display Board
Shorted Cable HV to Display Board
Replace Touch Panel.
Replace H.V. board.
Replace Display Board.
Replace Cable.
.
d
r
a
o
b
.
V
.
H
e
c
a
l
p
e
R
d
r
a
o
B
.
V
.
H
d
e
li
a
F
3
r
r
E
.
d
r
a
o
b
.
V
.
H
e
c
a
l
p
e
R
d
r
a
o
B
.
V
.
H
d
e
li
a
F
4
r
r
E
Err5
Shorted Touch Panel
NOTE:
If Touch Panel is pressed for more than 30 seconds , this error code
will appear.
1.
Disconnect oven from power supply.
2.
Disconnect side touch panel connector from displ ay board (J5).
3.
Reconnect oven to power supply.
4.
If “Err5” reappears after 30 seconds, replace top touch panel.
5.
If “Err5” does not reappear after 30 seconds, re place side touch panel.
.
d
r
a
o
b
.
V
.
H
e
c
a
l
p
e
R
d
r
a
o
B
.
V
.
H
d
e
li
a
F
6
r
r
E
HOT
t
Open TCO (magnetron).
t
Blower motor inoperative.
t
Restricted air filter.
t
High ambient temperature.
t
Oven operated empty or with light loads.
t
Broken or loose wire.
t
H.V. board inoperative.
Door
Door Interlock Primary Switch
t
Verify latch mechanism moves freely on door.
t
Verify J1 connector on display board is properly seated.
t
Test interlock switch assembly and perform door adjustment if necessary.
t
Replace interlock switch assembly.
!
Summary of Contents for KFC2W2
Page 3: ...1 Important Safety Information 1 ...
Page 12: ...10 RC MRC 60 Hz Quick Start Reference Guide Sample 3 ...
Page 21: ...19 RC MRC 60 Hz Oven Construction 4 ...
Page 29: ...27 RC MRC 60 Hz Component Testing Procedures 7 ...
Page 41: ...39 RC MRC 60 Hz Service Test 8 ...
Page 47: ...45 RC MRC 60 Hz Wiring Diagrams Schematics 9 ...
Page 48: ...46 Wiring Diagram Sample Two Tube Models 9A BBCDBCB EF7 ...
Page 49: ...47 Schematic Sample Two Tube Models 9A BBCDBCB EF7 12719301 DANGER HIGH VOLTAGE ...
Page 50: ...48 Wiring Diagram Sample Two Tube Models 6 G 6 9A BBCDBCB EF7 Monitor Relay Board ...
Page 52: ...50 Wiring Diagram Sample Two Tube Models 6 G 6 9A B CHBCBE C7 Single HV Transformer ...
Page 53: ...51 Schematic Sample Two Tube Models 6 G 6 9A B CHBCBE C7 Single HV Transformer ...
Page 54: ...52 Wiring Diagram Sample Three Tube Models 9A BBCDBCB EF7 ...
Page 55: ...53 Schematic Sample Three Tube Models 9A BBCDBCB EF7 12719101 DANGER HIGH VOLTAGE ...
Page 56: ...54 Wiring Diagram Sample Three Tube Models 01 Monitor Relay Board ...
Page 57: ...55 Schematic Sample Three Tube Models 01 Monitor Relay Board ...
Page 58: ... 0 12 34 56 7 8 8 9 5 8 2 9 2 www acpsolutions com ...
