English
6/6
PST 120-350
7 Troubleshooting
FAULT
CAUSE
REMEDY
Clean
condenser
High dew point
refrigeration compressor
operating?
ST thermostat tripped
Cooling air high tem-
perature
Excessive thermal load
(air fl ow, inlet temperature)
Fan pressure
switch (PV) not
set
Replace
pressure
switch
Z
Condenser
dirty or ob-
structed
Low current
absorption
No
refrigerant
recharge
Z
Low current
absorption
Request external
assistance
Decrease
cooling air tem-
perature
Decrease
compressed air
quantity tempera-
ture
Clean
condenser
Replace pres-
sure switch
Z
Replace fan
Z
HP pressure switch
tripped
Cooling air high
temperature
Excessive thermal
load (inlet air fl ow,
temperature)
Condenser dirty or
obstructed
Fan does
not turn (PV pres-
sure switch fault)
Fan fault
No
No
No
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Lt Low evaporation
temperature alarm Ld
Low dew point alarm.
Low
cooling
air
temperature
Fan
always
working
(PV pressure
switch fault)
Replace
pressure
switch
Z
Hot gas
valve
not calibrated
Calibrate
valve
Z
Increase
cooling air
temperature
No
No
No
Yes
Yes
Yes
LP Low
pressure alarm
LP
Low pressure
switch fault
Replace
pressure
switch
Z
Liquid line
solenoid valve
closed
No
Replace
the coil
Z
Yes
No
High current ab-
sorption
Compressor
noisy
Compressor
components
perished
Condenser dirty or
obstructed
Repair or
replace
compressor
Z
Compressor
winding with
partial loss of
insulation
No
Yes
No
Yes
Yes
CP
compressor
thermal protection
alarm
The compressor
works in the op-
posite direction
invert
the phases
Yes
No
Compressor
fault
Yes
Содержание Polestar-Smart PST120
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Страница 100: ...Русский 8 8 PST 120 350 ...
Страница 111: ...8 5 EXPLODED DRAWING 11 PST 120 350 PST 120 180 Ac ...
Страница 112: ...8 5 EXPLODED DRAWING 12 PST 120 350 PST 220 350 Ac ...
Страница 113: ...8 5 EXPLODED DRAWING 13 PST 120 350 PST 220 350 Wc ...
Страница 114: ...8 6 DIMENSIONAL DRAWING 14 PST 120 350 PST 120 180 Ac ...
Страница 115: ...8 6 DIMENSIONAL DRAWING 15 PST 120 350 PST 220 350 Ac ...
Страница 116: ...8 6 DIMENSIONAL DRAWING 16 PST 120 350 PST 220 350 Wc ...
Страница 117: ...8 7 REFRIGERANT CIRCUIT 17 PST 120 350 PST 120 180 Ac PST 220 350 Ac A1 A1 ...
Страница 118: ...8 7 REFRIGERANT CIRCUIT 18 PST 120 350 A1 PST 220 350 Wc ...
Страница 119: ...8 8 WIRING DIAGRAM 19 PST 120 350 PST 120 180 Ac Sheet 1 of 5 Sheet 1 of 5 ...
Страница 120: ...8 8 WIRING DIAGRAM 20 PST 120 350 Sheet 2 of 5 Sheet 2 of 5 ...
Страница 121: ...8 8 WIRING DIAGRAM 21 PST 120 350 Sheet 3 of 5 Sheet 3 of 5 ...
Страница 122: ...8 8 WIRING DIAGRAM 22 PST 120 350 Sheet 4 of 5 Sheet 4 of 5 ...
Страница 123: ...8 8 WIRING DIAGRAM 23 PST 120 350 Sheet 5 of 5 Sheet 5 of 5 ...
Страница 124: ...8 8 WIRING DIAGRAM 24 PST 120 350 PST 220 350 Ac Wc Sheet 1 of 5 Sheet 1 of 5 ...
Страница 125: ...8 8 WIRING DIAGRAM 25 PST 120 350 Sheet 2 of 5 Sheet 2 of 5 ...
Страница 126: ...8 8 WIRING DIAGRAM 26 PST 120 350 Sheet 3 of 5 Sheet 3 of 5 ...
Страница 127: ...8 8 WIRING DIAGRAM 27 PST 120 350 Sheet 4 of 5 Sheet 4 of 5 ...
Страница 128: ...8 8 WIRING DIAGRAM 28 PST 120 350 Sheet 5 of 5 Sheet 5 of 5 ...
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