opening or room airflow from heaters or air conditioning ?
–
stabilize ambient conditions.
4/ sensor miss-located, damaged or wires may be damaged -
check mounts for control and Thermostat sensors, then trace wires
or tubing between sensors and controls.
5/ calibration sensitivity
– call Customer Service
6/ Overtemperature set too low
– be sure that Thermostat is more
than 5 degrees over desired set point; check if OVERTEMP pilot is
on continuously; turn controller knob completely clockwise to see if
problem solved then fol
low instructions in owner’s manual for
correct setting
– see section 5.8
7/ electrical noise
– remove nearby sources of RFI including
motors, arcing relays or radio transmitters.
8/ bad connection on temperature sensor or faulty sensor
– check
connectors for continuity and mechanical soundness while
watching display for erratic behavior; check sensor and wiring for
mechanical damage.
9/ bad connections or faulty relay
– check connectors for
mechanical soundness and look for corrosion around terminals or
signs of arcing or other visible deterioration.
Display and reference thermometer
don’t match
1/ calibration error
– see section 5.9
2/ controller failure
– evaluate if pilot light is operating correctly
3/ allow at least two hours to stabilize.
4/ see if reference thermometer is certified.
Calibrated at one temperature, but
not at another
Refer to Section 5.9
REFRIGERATION
Temperature can't get up to set point
1/ assure that power is going to heating coils.
2/ confirm that controller is calling for heat (check front panel light).
3/ if light not coming on, check control set point and Thermostat
set point .
4/ confirm that fan is operating and airflow is not blocked.
5/ reset by turning unit off and on.
Unit won't cool
If the compressor is running:
1/ see if condenser is cold but free of ice.
2/ be sure that fan is circulating air in the chamber and over the
evaporator.
3/ confirm proper sensor location and operation.
4/ look for leaks in the chamber or around the door gasket.
5/ assure ample room around the unit as described in Installation
section 2.2
6/ If 1 through 7 has been tried and still not functioning correctly,
call customer service.
If compressor isn’t running:
1
/ if too cold inside adjust “cold control”
located outside on bottom right rear
2/ check for non-operating relay
3/ confirm that compressor cooling fan motor is operable.
4/ check if motor has voltage to it.
