Parker PSE 120 Manual De Uso página 28

English
8 Troubleshooting
High current ab-
Compressor
sorption
noisy
No
Failed compressor
Condenser dirty or
components
obstructed
Yes
No
Repair or
Compressor
Yes
replace
winding with
compressor
partial loss of
Z
insulation
No
FAULT
Lt Low evaporation
temperature alarm
pressure alarm
Low dew point alarm.
Yes Low pressure
Clean
switch fault
condenser
Yes
Low
Increase
cooling
cooling air
air
temperature
temperature
No
Replace
Fan
Yes
pressure
always
transmitter
working
Z
(pressure trans-
mitter fault)
Liquid line
solenoid valve
No
closed
Hot gas
Yes
valve
Yes
not calibrated
Replace
Calibrate
the coil
valve
Z
Z No
PSE 120-350
REMEDY
CAUSE
Low
High dew point
refrigeration compressor
operating?
Replace
Yes
pressure
switch
Z
No
Excessive thermal load
(air fl ow, inlet temperature)
No
Replace
Yes pressure
pressure trans-
transmitter
mitter not set
Z
No
No
Request external
assistance
Thermostat tripped
Decrease
Yes
Cooling air high tem-
cooling air tem-
perature
perature
No
Decrease com-
Yes
pressed air fl ow/
temperature
No
Condenser
Yes
Clean
dirty or ob-
condenser
structed
No
Replace pres-
sure transmitter
Z
Replace fan
Z
12/12
HP
Pressure switch tripped
Yes
High cooling air
temp (ambient)
No
Excessive thermal
Yes
load (inlet air fl ow,
temperature)
No
Yes
Condenser dirty or
obstructed
No
Fan does
Yes
not turn (pressure
transmitter fault)
No
Yes
Fan fault
No