39
RG66001206 - Rev 03
MCA
È severamente vietata la riproduzione anche parziale di questo manuale / All copying, even partial, of this manual is strictly forbidden
SYMPTOM
G
Lack of gas
I
Frost in liquid
pipe downstream
from a filter
L
The unit works
continuously
without ever
stopping
M
The unit works
regularly but with
an insufficient
capacity
N
Frost in the
compressor
intake pipe
O
The defrosting
cycle is never
activated
P
Abnormal noises
detected in the
system
Cooling
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Heating
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Who can take
corrective action
U
= User
S
= specialised
personnel
S
S
S
U
S
S
S
S
S
S
S
S
S
S
S
S
S
Possible control
panel indication
L1
H1
L1
Probable cause
Cooling circuit leak
Liquid filter clogged
Lack of refrigerant gas
Wrong setting of operating thermostat
Thermal overload
Compressor does not provide the rated
heating capacity
Liquid filter clogged
Low level of refrigerant
4-way cycle reversing valve defective
Expansion valve is not working properly
Water circulation pump blocked
Water circulation pump defective
Low level of refrigerant
Liquid filter clogged
4-way cycle reversing valve defective
The defrost thermostat has broken down or has
been set incorrectly
The compressor is noisy
The panels vibrate
Possible remedy
Check the cooling circuit using a
leak detector after pressurising the
circuit to approximately 4 bars.
Repair, evacuate and refill.
Replace the filter
See item G
Check the setting
Reduce the thermal load
Check and replace or overhaul
Replace
See item G
Check the valve power supply and
coils and replace the valve if
necessary
Check replace
Release the pump
Check the pump and replace it if
necessary
See item G
Replace
Check the valve power supply and
coils and replace the valve if
necessary
Check and replace if defective or
change the setting
Check and replace if necessary
Fasten properly
11
TROUBLESHOOTING
