250
6
English
7 troubleshooting
Z
FAULT
CAUSE
REMEDY
Low pressure
alarm
Lt Low evaporation tempera-
ture alarm
Ld Low dew point alarm
Compressor
noisy
Compressor
components
deteriorated
Low cooling air
temperature
Repair or
replace
compressor
Z
Fan always
working (PV
pressure Switch
fault
Clean
condenser
LP
Low pressure
switch fault
Replace
pressure
switch
Z
Calibrate
valve
Z
High dew point
warning
Ht
High temperature
alarm
Cooling air high
temperature
Excessive thermal load
(air fl ow, inlet temperature)
Fan pressure
switch (PV)
not set
Replace
pressure
switch
Z
Condenser
dirty or ob-
structed
Low current
absorption
No
refrigerant
recharge
Z
Low current
absorption
Request external
assistance
Decrease
cooling air tem-
perature
Decrease
compressed
air quantity tem-
perature
Clean
condenser
Replace
pressure switch
Z
Replace
fan
Z
HP
High pressure
alarm
Cooling air high
temperature
Excessive thermal
load (inlet air fl ow,
temperature)
Condenser dirty
or obstructed
Fan does
not turn (PV pres-
sure switch fault)
Fan fault
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Yes
Yes Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Hot gas valve
not calibrated
No
Yes
Yes
Replace
pressure
switch
Z
Summary of Contents for 250
Page 2: ......
Page 27: ...250 25 8 5 Exploded drawing 250 2 3 4 B1 9 6 12 15 B3 1 8 QS1 A B C D E ...
Page 28: ...250 26 8 6 Dimensional 250 i n c h e s mm c e n t e r o f g r a v i t y p o s i t i o n ...
Page 29: ...250 27 8 7 Refrigerant circuit 250 A1 ...
Page 30: ...250 28 8 8 Wiring diagram 230V 1Ph 60Hz ...
Page 31: ...250 29 8 8 Wiring diagram 230V 1Ph 60Hz ...
Page 32: ...250 30 8 8 Wiring diagram 230V 1Ph 60Hz ...
Page 33: ...250 31 8 8 Wiring diagram 230V 1Ph 60Hz ...
Page 34: ...250 32 8 8 Wiring diagram 230V 1Ph 60Hz 5x20 24V 1A T ...
Page 35: ...250 33 8 8 Wiring diagram 230V 3Ph 60Hz ...
Page 36: ...250 34 8 8 Wiring diagram 230V 3Ph 60Hz ...
Page 37: ...250 35 8 8 Wiring diagram 230V 3Ph 60Hz ...
Page 38: ...250 36 8 8 Wiring diagram 230V 3Ph 60Hz ...
Page 39: ...250 37 8 8 Wiring diagram 230V 3Ph 60Hz ...
Page 40: ...250 38 8 8 Wiring diagram 230V 3Ph 60Hz ...
Page 41: ...250 39 8 8 Wiring diagram 460V 3Ph 60Hz ...
Page 42: ...250 40 8 8 Wiring diagram 460V 3Ph 60Hz ...
Page 43: ...250 41 8 8 Wiring diagram 460V 3Ph 60Hz ...
Page 44: ...250 42 8 8 Wiring diagram 460V 3Ph 60Hz ...
Page 45: ...250 43 8 8 Wiring diagram 460V 3Ph 60Hz ...
Page 46: ...250 44 8 8 Wiring diagram 460V 3Ph 60Hz ...
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