Troubleshooting - Parker PDRD Manuel D'utilisation

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7

Troubleshooting

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