21
RS5320014 Rev. 0
Display Diagnostics
CAUTION
!
All repairs as described in this troubleshooting guide section are to be performed only after the caution procedures
one through six listed below have been followed.
1.
Check earthing before checking for trouble.
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 wire
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 earth while working on this panel to discharge any static
charge in your body.
6.
220/240 Vac is present in the high voltage board terminals of power relay and primary circuit of low voltage
transformer.
7.
When troubleshooting, be cautious of possible electrical hazard.
Service Codes
During operation, the display may show the following service codes:
Service Codes
Explanation
S1
Watchdog - Membrane Touch Panel
CS
Current Sense
FL
Low Current
FH
High Current
PL
Power Level
PCE1
Checksum - Check Permanent Memory
PCE5
Communication Failure
PCE6
Communication Failure
HOT
Magnetron Overheating
HI
High Line Voltage
LO
Low Line Voltage
