5. Fault diagnosis
Unit does not operate
Temperature does not rise
when expected
Temperature continues to
rise when not expected
Unit fails to cool
Unit not switched on
Unit not plugged into
power supply
Fuse blown in unit or
in plug (UK units only)
Electrical power supply
failure
Overtemperature cut-out
has operated
Set temperature is lower
than liquid temperature
Liquid level cut out has
operated.
Temperature control
circuit fault
Set temperature is higher
than liquid temperature
Compressor over heated
causing compressor internal
overtemperature thermostat
to operate
Temperature control
circuit fault
Switch on
Plug in, switch on
Check and replace
Check that other electrical
appliances on same circuit
are working.
Reset cut-out as described in
Check set temperature
Check liquid level.
Have unit checked by
competent person
Check set temperature
Wait for compressor to cool, when
thermostat will reset and
compressor will switch on again
Have unit checked by
competent person
thermostat Operating Instructions
Symptom
Possible cause
Action required
Page 15
Low temperature bath/circulator
Operating instructions
Version 4 - Jan 2010
