62
RF-SVX003A-GB
Troubleshooting
SYMPTOM
cooling
heating
Who can take
corrective
action
U = User
S = specialised
personnel
Probable cause
Possible remedy
E
The
compressor
does not
start because
the minimum
pressure
switch has
tripped
X
X
S
Pressure switch out of
order
Check and replace
X
X
S
Circuit completely empty
See point G
X
U
Finned coil clogged, air
fl
ow rate is too low
Remove dirt from the coil
X
U
Water circulation pump
blocked
Unlock the pump
X
S
Water circulation pump
blocked defective
Check the pump and replace
if necessary.
X
S
Presence of frost on
evaporator coil
See point O
X
S
Evaporator fan not
working
See point F
X
X
S
Refrigerant
fi
lter clogged
Check and replace
X
X
S
Expansion device that is
not working properly
Check and if necessary
replace
X
X
S
The presence of moisture
in the refrigerant circuit
Replace dry
fi
lter and
eventually recharge
F
The fans
do not start
X
X
S
Fan contactor de-
energized
Check the voltage across the
coil of the contactor and the
continuity of the coil
X
X
S
The absence of output
voltage from the fan
Check the contacts, replace if
necessary
X
X
S
Thermal protection inside
the fan
Check the condition of the
fan and the air temperature
during operation of the unit.
X
X
S
Fan motor faulty
Check and replace
X
X
S
Loose electrical
connections
Check and secure
G
Lack of gas
X
X
S
Loss in the refrigerant
circuit
Check the cooling circuit
using a leak detector after
pressurising the circuit to
approximately 4 bars. Repair,
evacuate and re
fi
ll.
