MANUALP/4000_SERVICE_0712 July2012
26
DISPLAY PRESENT- BUT CONTROLLER WILL NOT OPERATE
CORRECTLY
- Data corrupted Switch off for ten seconds
Check set points and
calibration
- Component failure Call Service
DISPLAY ON BUT SHOWING RUBBISH!
The only power supplied to the display PCB is from the 5 volt supply on the
controller board. If the LED displays are illuminated it is a good indication that
the 5v power supply is present.
- Faulty Reset Turn Mains power off for 10
seconds
Call Service
CO
2
is too HIGH (IE Set for 5% but showing > 10% and not controlling).
- Check CO
2
Inlet Regulator Pressure is not set too high.
CO
2
Inlet Solenoid is Stuck OPEN. Call Service
ROUTINE MAINTENANCE
Suggested to be checked Annually:
• Check glass door gasket for damage (cuts and splits), replace if necessary.
• Check glass door seals correctly onto gasket, adjust side mounted door
latch plate if required.
• Remove and clean water supply tray - refit.
• Wipe out floor of cabinet to remove any water stains.
• Check door controller overlay for damage, replace if necessary.
• Check basic cabinet control functions and that user hi-limit control is set
appropriately.
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