Parker DRD1200 Manuel D'utilisation page 8

English
7 troubleshooting
CP
compressor thermal
Compressor noisy
protection alarm
Yes
Yes
Th e compressor
Compressor
No
works in the op-
components
posite direction
perished
Yes No
Replace
Yes
Compressor
compressor
fault
Z
No
FAULT
Lt low evaporation
temperature alarm
Low dew point
Yes
Increase
Yes
Low cooling air
cooling air
temperature
temperature
No
Replace
Fan always
pressure Yes
working (PV
switch
pressure switch
Z
fault)
Replace
Yes
invert
the coil
the phases
No
Z
Yes
Calibrate
Liquid line
Yes
Hot gas valve not
valve
solenoid
calibrated
Z
closed
No
REMEDY
CAUSE
Lt low evaporation
High dew point re-
temperature alarm
frigeration compressor
Low dew point
operating?
Yes
Yes
Replace
Yes
LT
pressure
Low pressure
switch
switch fault
Z
Excessive thermal load
(air fl ow, inlet temperature)
No
Replace
Fan pressure
Yes pressure
switch (PV)
switch
not set
Z
No
No
Low current Yes refrigerant
absorption recharge
Z
No
No
Request external
assistance
ST thermostat tripped
Yes
Decrease
Yes
Cooling air high
cooling air tem-
temperature
perature
No
Decrease
Yes
compressed
air quantity tem-
perature
No
Condenser
Yes Clean
dirty or ob-
condenser
structed
No
Replace
pressure switch
Yes
Low current
Z
absorption
No
Replace
fan
Z
6
DRD1200-6000
HP pressure switch
tripped
Yes
Yes Cooling air high
temperature
No
Excessive thermal
Yes
load (inlet air fl ow,
temperature)
No
Yes
Condenser dirty
or obstructed
No
Fan does
Yes
not turn (PV pres-
sure switch fault)
No
Yes
Fan fault
No