Grant SUB6 User Manual

SUB Universal, SBB boiling, JB and PB unstirred water baths
Part No. 15133/Issue 14 Page 11 January 2010
5 Fault Diagnosis
Symptom
Possible cause
Action required
Unit does not operate
Unit not switched on
Switch on
Unit not plugged into power
supply
Plug in, switch on
Power supply failure
Check that other electrical
appliances on the same circuit
are working
Fuse blown in unit or in plug
(UK units only)
Check and replace - see 7.1
SUB Alarm lamp on
or
SBB heater lamp does not
come on
Over temperature cut-out has
operated
Reset cut-out and check its
setting as described in 3.l.3
and 3.1.4.
Check water level
If the cut-out operates again
or cannot be reset, have the
unit checked by a competent
person.
Temperature does not rise
when expected
Set temperature is lower than
liquid temperature (not SBB)
Check set temperature
Set temperature is too close
to ambient (not SBB)
Raise set temperature
JB1 thermal fuse has
operated
Have JB1 thermal fuse
replaced by competent
person, see Service Manual
JB2, JB4, JB5, PB1
Internal over temperature cut-
out has operated
Check water level
Have over temperature cut-
out reset by competent
person.
SBB over temperature cut-out
has operated
Reset cut-out
Temperature control circuit
fault (not SBB)
Have unit checked by
competent person
Temperature continues to rise
when not expected (not SBB)
Set temperature is higher than
water temperature
Check setting
Temperature control circuit
fault
Have unit checked by
competent person

Grant SUB6 Specifications

General

Brand	Grant
Model	SUB6
Category	Laboratory Equipment
Language	English