Parker PDRD Series, User Manual

Page: 32 / 129

PDRD125---PDRD175
4
English
7 Troubleshooting
Z
Condenser dirty
Ambient temperature
over 122 ˚ F (50 ˚ C)
Compressor
components
perished
Repair or
replace
compressor
Z
Seek external
assistance
Compressor
winding insulation
partially perished
(compressor
too hot)
Heat exchanger
fouled with
debris
Reduce compressed
air quantity or air
temperature
Compressor
noisy
Excessive
current
consumption
High pressure
drop on air side
High refrigerant
discharge
pressure:
HT trip.
Fan pressure/
thermostat
switch (PV/TV)
calibration error
or damaged.
Condenser
dirty
Ice formation
on evaporator
(low
evaporation
pressure)
Clean heat
exchanger (blow
compressed air in
opposite direc-
tion to operating
air flow). Fit/
renew prefilter
By---pass air flow
keeping air inlet
open. Open con-
densate drain
valve manually.
Restart, checking
the calibration of
the expansion
valve or hot gas
valve.
Z
High dew
point
High refrigerant
temperature.
HT trip.
Fan does not work
Excessive thermal load
(compressor head too hot)
Low current consumption
Clean
condenser
Reduce
temperature
Replace fan
Z
Insufficient
refrigerant: repair any
leaks and recharge the
circuit
Z
Clean
condenser
Fan does
not work
Replace fan
Z
Replace
pressure switch
Z
Condenser
dirty
Clean
condenser
Fan does
not work
Replace fan
Z
FAULT
CAUSE REMEDY
No
No
No
No
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes