Parker PDRD Serie Manual De Uso página 58

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