Parker PDRD Series, User Manual

Page: 7 / 129

PDRD10---PDRD100
4
English
7 Troubleshooting
FAULT
CAUSE REMEDY
Fan thermostat
switch (TV)
incorrectly
calibrated
Repair
fan
Yes
Yes
No
No
No
Yes
No
Yes
No
No
No
Yes
Yes
No
Yes
Yes
Yes
No
Cooling air outlet
too high / High
dew point
Overload
protector
(SK/HT) tripped
Condenser dirty
Clean
condenser
Fan does
not work
Repair
fan
Ambient
temperature
over 122 ˚ F
(50 ˚ C)
Reduce
temperature
Compressor
components
perished
Repair or
replace com-
pressor
Seek external
assistance
Compressor
winding insulation
partially perished
(compressor
too hot)
Low current
consumption
insufficient refri-
gerant: repair any
leaks and recharge
the circuit
Clean
condenser
Fan does
not work
Excessive
thermal load
(compressor
head too hot)
Reduce
compressed air
quantity or air
temperature
Compressor
noisy
Excessive
current
consumption
High refriger-
ant discharge
pressure
No
Yes
Calibrate or
replace
thermostat
No
Condenser
dirty
Yes
Clean
condenser
Replace
fan
No
Yes
Fan does
not work
Condenser dirty
High pressure
drop on air
side
heat exchanger
fouled with
debris
ice formation
on evaporator
(low evapora-
tion pressure)
clean heat
exchanger (blow
compressed air in
opposite direction
to operating air
flow). Fit/renew
prefilter
by---pass air flow
keeping air inlet
open. Open con-
densate drain
valve manually.
Restart appliance
checking setting
of expansion
valve and fan
thermostat
Yes
Yes
No