Parker -W4P, Руководство пользователя

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66
MSC4000 - MSC15000 USER MANUAL
Alarm (100’s) /
Warning (200’s)
Fault
Code
Rules & Causes Possible Remedy
SENSOR POWER
FUSE
122
Rules:
• Shut down if sensor fuses (F1) opens
• There are no user settings associated with
this alarm
• The alarm must be manually reset from the
main screen
Causes:
1) Shorted sensors
2) Bad power connection to sensor(s)
Refer to electrical schematic when trouble
shooting power circuit
Note: Be careful that the orientation of all
sensor connectors are marked before remov-
ing a connector from its sensor. Improperly
orientated sensor cable may result in a short
and potentially damage the sensor
1) Remove all sensor connectors from sensors
1a) Check for short - <50 ohms between circuit
12 & circuit 11 (ground)
1b) If short is no longer present, then install
each connector one at a time and recheck for
shorts until the shorted sensor is found. Check
for proper connector orientation before making
final determination that a sensor is bad.
2) Check all power connections to the sensors
EMERGENCY STOP 123
Rules:
• The Emergency Stop switch has been
pressed
• The Emergency Stop switch should only be
used in an emergency and is not to be used
for turning the dryer on/off under normal
circumstances
• Pressing the Emergency Stop switch imme-
diatley
interrupts the refrigeration process by remov-
ing power to the compressor and all valves
• Using the Emergency stop switch for other
than emergency situations may result in
voiding the warranty of the dryer
PRESSURE SENSOR
ALARM & WARNING
131-
132 &
241-
242
Rules:
• Fault if pressure sensor input is less than
0.8V or
greater than 5.2V
• Shuts down the dryer if the Discharge or
suction sensors fault
• Warn only if the Inlet and or Outlet pressure
sensors fault
• There are no user settings associated with
this alarm
• The alarm must be manually reset from the
main screen
Causes:
1) Defective sensor
2) Improper wiring
1) Replace sensor
2) Check wiring per electrical schematic. Vefify
sensor cable shield is connected to power
supply only and open on sensor end. Do not
allow shield to short to chassis ground.
TEMPERATURE
SENSOR ALARM &
WARNING
141-
144 &
251-
253
Rules:
• Faults if the temperature sensor input circuit
senses an open or shorted circuit
• Shuts down the dryer if the Discharge, Suc-
tion or Dew Point sensors fault
• Warn only if the Inlet, Outlet or Condenser
temperature sensors fault
• There are no user settings associated with
this alarm
• The alarm must be manually reset from the
main screen
Causes:
1) Defective sensor
2) Shorted or sensor cable shorted
3) Bad input module
1) Check thermistor, measure resistance
across the leads and verify that it is between
10K (equal to about 108°F) and 100K (equal to
about 20°F)
2) Make sure neither sensor lead is shorted to
the cable shield
3) Verify the input module - place a 10K resis-
tor across the temperature input terminals and
verify it reads between 100°F and 120°F