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