Parker Hiross Polestar-Smart Manual De Uso página 7

7 Troubleshooting
High current
Compressor
absorption
noisy
Compressor
No
Condenser dirty or
components
obstructed
perished
Yes
Yes
Repair or
Compressor
Yes
replace
winding with
compressor
partial loss of
Z
insulation
No
English
FAULT
Lt Low evaporation
LP Low
temperature alarm Ld
pressure alarm
Low dew point alarm.
LP
Yes
Clean
Low pressure
condenser
switch fault
No
Yes
Low
Increase
cooling
cooling air
air
temperature
temperature
No
Replace
Fan
Yes
pressure
always
switch
working
Z
(PV pressure
switch fault)
Liquid line
solenoid valve
No
closed
Hot gas
Yes
valve
Yes
not calibrated
Replace
Calibrate
the coil
valve
Z
No
Z
REMEDY
CAUSE
High dew point re-
frigeration compressor
operating?
Replace
Yes
pressure
switch
Z
Excessive thermal load
(air fl ow, inlet temperature)
No
Replace
Fan pressure
Yes
pressure
switch (PV)
switch
not set
Z
No
No
Low current Yes
refrigerant
absorption recharge
Z
No
No
Request external
assistance
PST 070
ST thermostat tripped
Decrease
Yes
Cooling air high
cooling air tem-
temperature
perature
No
Decrease
Yes
compressed air
quantity tempe-
rature
No
Conden-
Yes
Clean
ser dirty or
condenser
obstructed
No
Replace pressu-
Yes
Low current
Z
re switch
absorption
No
Replace
fan
Z
HP pressure switch
tripped
Yes
Cooling air high
temperature
No
Excessive thermal
Yes
load (inlet air fl ow,
temperature)
No
Yes
Condenser dirty or
obstructed
No
Fan does
Yes
not turn (PV pres-
sure switch fault)
No
Yes
Fan fault
No
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