Contherm MITRE 4150 - SECTION 7 TROUBLESHOOTING AND MAINTENANCE; TROUBLESHOOTING COMMON ISSUES

MANUALP/4000_SERVICE_0712 July2012
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SECTION 7 TROUBLESHOOTING AND MAINTENANCE
All fault alarms are displayed on the TEMPERATURE LED display. The
appropriate fault alarm can be identified in the Alarm Code list.
NO DISPLAY WHEN MAINS SWITCH TURNED ON.
- Cabinet not plugged in Plug in.
- Input Fuse blown (5AMP) Replace.
- Check power at electrical outlet Turn on wall socket.
- ZP22 PWR PCB fuse blown (2AMP) Replace.
- None of the above is at fault Call Service
NB: Unplug cabinet from wall socket before checking or replacing any
fuses.
DISPLAY ON BUT FAN MOTOR STOPPED
- Outer Door Open Check DOOR LED. Close
door.
Call Service
HI-LIMIT NEON COMING ON AND CABINET NOT UP TO TEMPERATURE.
- Hi-Limit thermostat tripping Reset Hi-Limit.
ENCLOSURE WILL NOT HEAT/COOL TO TEMPERATURE
- Door open Check DOOR LED. Close
door.
- Faulty heater element Call Service
- Already at temperature Wrong set point entered.
TEMPERATURE CONTROL NOT TIGHT ENOUGH
- Circulation Fan stopped Check/change fan motor.
- Sensor faulty. Call Service
INACCURATE READINGS ON ANY PARAMETER
- Not correctly calibrated Calibrate.
- Faulty sensor Call Service
- Component failure Call Service
NO CO
2
COMING INTO CABINET - No Alarm.
- Outer door open Check DOOR LED. Close
door.
- CO
2
set point set too low (possibly 0.0) Reset CO
2
setpoint.