SERVICE CODES
6-1
Introduction
The combination ovens are designed to diagnose system faults by dis-
playing single or combination service codes in the Time and Cook
Temperature windows. During a reset procedure, the customer will first
notice the service light and buzzer.
When A Customer Calls
When a customer calls for service, ask if any service codes appeared in
the Time display window. If the customer does not know, ask them to per-
form the following reset procedure:
1) Turn off oven power by pressing the ON touch pad.
2) While pressing the COMBO touch pad, press the ON touch pad. If no
errors are found, the unit will beep and show four zeros (dashes after
GC7243MS and C7439MS) in the Time display window. If errors are
found, the unit will not beep and service codes will be displayed in the
Time window. If there are more than four different errors at one time,
some of the numbers will be displayed in the Cook Temperature win-
dow.
3) If service codes are displayed, ask the customer to record the service
code number or numbers, press the CLEAR touch pad, and select
Combo mode. If service light does not come on after five minutes, tell
the customer the oven is ready for operation. If the service light comes
on, proceed to step 4.
4) Repeat steps 1 and 2. If any service codes appear for the current
operating mode, ask the customer to call you back and tell you what
codes are displayed.
Service Messages
There are two types of service messages (errors), non-critical and critical.
If there is a non-critical error, the unit can still operate. However, the prob-
lem should be investigated as soon as possible using the following serv-
ice code troubleshooting procedures.
The unit will not operate in its present mode when there is a critical error,
but it may operate in another mode (see the following table). Use the fol-
lowing service code troubleshooting procedures to correct the problem.
Convection Combo
Operation after an error occurs
* yes = non-critical error no = critical error
5A, 7A, 9 apply to units after GC7243MS and C7439MS
1
2
3
4
5
5A 6 7 7A 8 1&2 9
yes yes no yes yes NA no yes no no no no
yes
yes
no no yes NA no yes no no no no
yes yes yes no yes NA yes yes yes yes yes yes
yes yes no yes yes NA no yes no no no no
Mode
Steam
Combo
Oven
Clean Cycle
Service Message Code
(Revised 1/02)
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