61
RF-SVX003A-GB
SYMPTOM
cooling
heating
Who can take
corrective action
U = User
S = specialised
personnel
Probable cause
Possible remedy
B
The
compressor
does not
start
X
X
S
Compressor burnt or
seized
Replace the compressor
X
X
S
Compressor contactor
de-energized
Check the voltage across
the coil of the compressor
contactor and the continuity of
the coil
X
X
S
Power circuit open
Investigate the cause of the
protection, and check if there
are any short circuits in the
wiring or in the windings of
the motors of pump, fan,
compressor and transformer
X
X
S
Motor thermal
protection open
The compressor has operated
in critical condition or there
is a lack of charge in the
circuit: Make sure that working
conditions are within the limits
of operation. Loss of coolant:
see section G
C
The
compressor
starts up
and stops
repeatedly
X
X
S
Intervention of the
minimum value of set
point
See point E
X
X
S
Compressor contactor
defective
Check and replace if necessary
X
X
U
Calibration values Of the
set-point or differential
wrong
Modify them as reported in the
tables.
X
X
S
Lack of coolant
See point G
D
The
compressor
does
not start
because the
maximum
pressure
switch has
tripped
X
X
S
Pressure switch out of
order
Check and replace
X
X
S
Overcharge of
refrigerant
Download the excess gas
X
U
Finned coil clogged, air
fl
ow rate is too low
Remove dirt from the battery
and obstructions to the air
fl
ow.
X
S
Fan not working
See point F
X
U
Water circulation pump
blocked
Unlock the pump
X
S
Water circulation pump
defective
Check the pump and replace if
necessary.
X
X
S
Presence of non-
condensable gases in
the refrigerating circuit
Prime the circuit after it has
been evacuated and put under
vacuum
X
X
S
Refrigerant
fi
lter
clogged
Check and replace
Troubleshooting
