Troubleshooting - SIFA POP 0512 Guide Technique

GB

6 TROUBLESHOOTING

PROBLEM
1) The compressor will not start
2) Display top temperature is not
sufficiently low
110
LIKELY CAUSES
a) there is no electric current because
the automatic circuit breaker (or fuse,
if applicable), has been triggered
b) the main switch has not been
activated
c) the thermostat has been set too
high
d) compressor overload due to lack of
condensation caused by condenser
being blocked by dust or other
a) evaporator blocked by ice
b) condenser blocked by dust or
other
c) lack of gas (the evaporator does
not defrost correctly)
d) the counter is exposed to draughts
or to direct sunlight
e) the proper air flow is not reach-
ing the condenser (something, e.g.
sheets of paper, cloths, etc. is block-
ing the condenser air passage grille)
f ) the thermostat is not functioning
regularly (with the refrigerating
system in perfect working order, the
thermostat intervenes before the set
temperature has been reached)
POSSIBILE SOLUTIONS
a) turn off the automatic circuit
breaker (or replace the fuse)
b) enable the main switch
c) if the set temperature of the
thermostat is above that of the
display top, the compressor will
not start up; check the setting of
the required temperature (see
Section 3.2) with that of the current
temperature
d) enable he main switch to cut
off the power supply to the dis-
play unit; clean the condenser
fins, as described in Section 4.2;
then reconnect the power to the
display unit
a) carry out defrosting as follows:
- Turn off the main switch for 10-12
hours in order to permit the evapo-
rator to defrost (see Section 4.4)
b) clean the condenser as indicated
in Section 4.2
c) call a qualified refrigeration engineer
to detect the cause of the gas leak .
When this has been solved, refill the
system in accordance with the quality
and quantity of gas shown on the plate
d) the display unit will not function
in these circumstances: remove it
from any draughts and/or from direct
sunlight
e) remove anything which is pre-
venting regular air flow to the
condenser
f ) call a qualified refrigeration
engineer to replace the thermostat