Parker PDRD Manuel D'utilisation page 88

7 Troubleshooting
Compressor
noisy
Compressor
components
deteriorated
no
yes
Repair or
replace
compressor
Z
English
Z
FAULT
Lt Low evaporation temperature alarm
Ld Low dew point alarm.
Low
Increase
yes
cooling
cooling air
air
temperature
temperature
no
Fan Replace
yes
always
pressure switch
working
Z
(PV pressure
switch fault)
no
Hot gas Calibrate
yes
valve valve
not calibrated Z
no
CAUSE REMEDY
High
LP Low
dew point
pressure
warning
alarm
Replace
LP
yes
pressure switch
Low pressure
Z
switch fault
no
Excessive thermal load
(air flow, inlet temperature)
no
Replace
Fan
yes
pressure switch
pressure switch
Z
(PV) not set
no
No
Low
refrigerant.
yes
current
Recharge
absorption
Z
no
Request external assistance
Ht
High
temperature
alarm
Cooling
Decrease
yes yes
air
cooling air
high
temperature
temperature
no
Decrease
yes yes
compressed
air quantity
temperature
no
Condenser
yes
yes Clean
dirty or
condenser
obstructed
no
Low Replace
yes yes
current pressure switch
absorption Z
no
Replace fan yes
Z
HP
high pressure
alarm
Cooling
air
high
temperature
no
Excessive
thermal load
(inlet air flow,
temperature)
no
Condenser
dirty or
obstructed
no
Fan
does not turn
(PV pressure
switch fault)
no
Fan
fault
no
7
PDRD250