13
TROUBLESHOOTING
CAUTION: Extreme caution must be exercised any time access is made into
areas housing electrical components. Repair, replacement or adjustment of
components in these areas must only be done by qualified technicians familiar
with electrical circuitry and the operation of the chamber. FOR PERSONAL
SAFETY, ALWAYS DISCONNECT THE POWER BEFORE SERVICING.
TEMPERATURE
Temperature too high-display and
reference thermometer don’t
match
1/ Controller set too high-see section 5.5.
2/ Controller failed on – call Customer Service.
3/ Wiring error – call Customer Service.
Display reads "HI" or "400"+
Probe is unplugged, is broken or wire to sensor is broken –
trace wire from display to probe; move wire and watch
display to see intermittent problems.
Chamber temperature spikes
over set point and then settles to
set point
Recalibrate – see section 5.6.
Temperature too low-display and
reference thermometer don’t
match
1/ Overtemperature Thermostat set too low – see section
5.7.
2/ Controller set too low – see section 5.5.
3/ Unit not recovered from door opening – wait for display
to stop changing.
4/ Unit not recovered from power failure or being turned off
– incubators will need 24 hours to warm up and stabilize.
5/ Element failure – see if HEATING light is on; compare
current draw to data plate.
6/ controller failure – confirm with front panel lights that
controller is calling for heat
7/ Overtemperature failure – confirm with front panel lights
that Thermostat is operating correctly.
8/ Wiring problem – check all functions and compare wiring
Section
7
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