Techne RB-22A - Manual (Page 16)

P A G E 14
R e f r i g e r a t e d B a t h s U S E R ’ S M A N U A L
Fault Finding
1 Check that the airways have not been restricted either by
something placed in front of them or through build up of dust
and fluff on the grilles, etc.
2 Loss of performance is most often caused by deterioration of
the working liquid. As a first check always mix up a new batch
of liquid and re-test the unit. NEVER top up the mix with water
always use a quantity of the proper mix.
3 The next most common cause of poor performance is that the
liquid is not being circulated over the coil or through the heat
exchanger properly. First check that the pump unit is not
blocked either by foreign matter or by balls from a ball blanket
or in any other way. Also check that the pipe system, if you are
using the fridge unit for an external system, is not kinked or
restricted in any way.
4 If the liquid or the circulation is not the cause of the poor
performance then there may be a number of other causes.
5 Check that the internal fan is running by feeling if there is air
blowing when the unit is on. If not then the unit needs servicing
as below.
6 Check that the compressor is running by listening for it to start
and stop as the unit gets to its lowest temperature. If not then
the unit needs servicing as below.
7 Last of all the unit may have lost gas and needs servicing as
below
8 For detailed repair instructions of the thermoregulator refer to
the appropriate model instructions.
NOTE: Before any work is undertaken on the thermoregulator it
MUST be removed from the bath.