Operating Instructions

Page 8 of 12
Drawing : - TPC156
Issue : - 1
Date : - 04/11/03
REPAIRS
Should an electrical component fail simply replace it with a spare supplied by
the Manufacturers.
If refrigerant gas is lost from the machine it will be necessary to use a
Refrigeration Engineer to correct the fault. The type and quantity of refrigerant
used can be found on the Serial Number plate normally positioned in the
electrical box.
It is essential that any refrigerant repairs are carried out by competent
Refrigeration Engineers. The following procedure must be used:-
a) The source of the leak must be traced and found
b) The filter dryer must always be replaced if there has been a leak on the
refrigeration system
c) The machine should be thoroughly evacuated before recharging.
d) The units must be recharged with the refrigerant measured accurately by
weight. Type and quantity by specification.
e) For evacuation and recharging of the machine use the crimped brazed
charging stubs attached to the compressor and filter dryer.
The charging stub should be crimped and rebrazed after servicing. Never
allow service valves to be fitted to any part of the circuit. Service valves may
cause a leak causing further loss of refrigerant.
The refrigerant compressor fitted to the dehumidifier is a durable unit that
should give many years service.
Compressor failures can result from the machine losing its refrigerant gas.
The compressor must be replaced by a competent Refrigeration Engineer
Failure of the compressor can be confirmed by:
a) Establish that the power is present at the compressor terminals using a volt
meter
b) With the power disconnected check the continuity of the internal windings
by using a meter across the compressor terminals. An open circuit
indicates that the compressor should be replaced.
c) Check the compressor is not “Down to Earth” by establishing that a circuit
does not exist between the compressor terminals and the shell of the
compressor.