Troubleshooting - Parker 250 Manuel D'utilisation

English
Z
7

troubleshooting

Lt Low evaporation tempera-
Compressor
ture alarm
noisy
Ld Low dew point alarm
Yes Yes
Compressor
No
Low cooling air
components
temperature
deteriorated
Yes No
Repair or
Fan always
replace
working (PV
compressor
pressure Switch
Z
fault
No
Hot gas valve
not calibrated
No
FAULT
Low pressure
alarm
Yes
LP
Yes
Clean
Low pressure
condenser
switch fault
Replace
Yes
pressure
switch
Z
Calibrate
Yes
valve
No
Z
REMEDY
CAUSE
High dew point
warning
Yes
Replace
Yes
pressure
switch
Z
Excessive thermal load
(air fl ow, inlet temperature)
No
Replace
Fan pressure
Yes pressure
switch (PV)
switch
not set
Z
No
Yes
No
Low current refrigerant
absorption recharge
Z
No
Request external
assistance
Ht
High temperature
alarm
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
250
HP
High pressure
alarm
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