Fault Diagnostics Overview - AGA RANGEMASTER eR7 Field Service Manual

Fault diagnostics overview

The Aga Er7 control system is capable of detecting a range of conditions that have been pre-
determined as fault conditions .Error codes are generated when an error condition is detected, the
code signifies the type of error and the zone(s) affected, the codes are stored in the main PCB and
can be reviewed at any time after the error has occurred. The codes are stored in two locations, a
permanent fault count accessed via the PC interface and a temporary fault log which can be
accessed via the PC interface or via the digital display on the main PCB. The PC interface requires the
Field engineers test software referred to as TEK Vision and a TEK Vision Interface Key.
The temporary fault log is cleared each time the PCB is manually reset via the reset button on the
main PCB, The permanent fault count cannot be cleared. Ensure temporary error codes are
accounted for before resetting the PCB.
Errors are grouped into two categories Blocking and locking errors, both Locking and blocking errors
will disable the output to a zone showing an error condition.
The five heat zones are, Hotspot (Boiling plate), Simmer plate, Roast oven, Bake oven and Simmer
oven.
Blocking Errors: Certain error codes when recognised within the control system will block, a
reassessment of the fault condition will be conducted periodically, and if the error is still present
after the fourth assessment the controls will lock and permanently disable that zone and will require
a repair and a manual reset to clear the error status. If a blocking error occurs four times in a 24hr
period it will lock and disable the zone.
Locking Errors: Some error conditions will go straight to locked on the first detection of the error
condition. These error codes also cannot be cleared without external intervention.
To clear the error condition the reset button has to be used, cycling the power will not reset the
controls and does not clear the locked condition.
Error codes can be further sub divided into types and these are listed below:
Zone overheat errors, Thermocouple differential errors, Thermocouple open circuit errors, Triac
errors, Relay errors, Open channel errors, Full power time out errors, User panel overheat errors.
The full fault code list can be read further on in this document.
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