Parker PDRD Series, User Manual

Page: 58 / 129

5
PDRD200
English
7 Troubleshooting
Z
FAULT
CAUSE REMEDY
Compressor
noisy
yes
Compressor
components
deteriorated
High current
absorption
Compressor
winding
with partial
loss of
insulation
Repair or
replace
compressor
Z
no
Condenser
dirty or
obstructed
yes
Clean
condenser
yes
Low dew point
Fan
always
working
(PV pressure
switch fault)
no
Low
cooling
air
temperature
Increase
cooling air
temperature
yes
Excessive thermal load
(air flow, inlet temperature)
yes
ST thermostat
tripped
no
yes
no
Hot gas
valve
not calibrated
Replace
pressure
switch
Z
yes
Calibrate
valve
Z
yes
no
no
no
yes
High dew point.
Refrigeration compressor
operating?
HP pressure
switch tripped
no
Fan
pressure switch
(PV) not set
Replace
pressure
switch
Z
yes
no
Low
current
absorption
No
refrigerant.
Recharge
Z
yes
no
Request external assistance
Decrease
compressed
air quantity
temperature
yes
no
Condenser
dirty or
obstructed
Clean
condenser
yes
no
Low
current
absorption
Replace
pressure
switch
Z
no
yes
Excessive
thermal load
(inlet air flow,
temperature)
no
no
yes
Condenser
dirty or
obstructed
Fan
does not turn
(PV pressure
switch fault)
Replace
fan
Z
Fan
fault
no
no
no
yes
yes
yes
no
Cooling
air
high
temperature
Decrease
cooling air
temperature
Cooling
air
high
temperature