Parker Polestar smart PSE 120 Manual De Uso página 42

8 Troubleshooting
CP
compressor
thermal protection
alarm
High current absorp-
Compressor noisy
Compressor
No
Condenser dirty or
components
obstructed
perished
Yes
The compressor
works in the opposi-
Yes
te direction
Yes
No
invert
the phases
Compressor
fault
Yes
Repair or
Yes
Compressor win-
replace
ding with partial
compressor
loss of insulation
Z
No
English
FAULT
Lt Low evaporation
temperature alarm Ld Low
tion
dew point alarm.
Yes
Clean
Low pressure
condenser
switch fault
Yes
Low
Increase
cooling
cooling air
air
temperature
temperature
No
Replace
Fan
Yes
pressure
always
switch
working
Z
(PV pressure
switch fault)
solenoid valve
No
Hot gas
Yes
valve
Yes
not calibrated
Replace
Calibrate
the coil
valve
Z
Z No
REMEDY
CAUSE
LP Low
High dew point refri-
pressure alarm
geration compressor
operating?
Replace
LP
Yes
pressure
switch
Z
No
Excessive thermal load
(air fl ow, inlet temperature)
No
Replace
Fan pressure
Yes
pressure
switch (PV) not
set
No
Liquid line
closed
No
Request external
assistance
PSE 120-350
Decrease
cooling air tempe-
Decrease
Yes
compressed air
quantity tempera-
No
Yes
Condenser dirty
or obstructed condenser
switch
Z
No
Replace pressure
switch
Replace fan
Z
HP pressure switch
tripped
Yes
Cooling air high
temperature
rature
No
Excessive thermal
Yes
load (inlet air fl ow,
temperature)
ture
No
Yes
Clean
Condenser dirty or
obstructed
No
Fan does
Yes
not turn (PV pressu-
Z
re switch fault)
No
Yes
Fan fault
No
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