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ALM-215
Sensor Fault -
Condenser
Pressure
Automatic if the
voltage
transmitted by
the sensor
returns to normal
Unit shuts down.
Alarm relay turns on.
Check condenser pressure transducer wiring. Confirm that 5 V
reference signal is available between IOB connector. Check for
disconnected, grounded, or shorted wiring. Check for condensation in
transducer connector.
ALM-216
Sensor Fault -
Evaporator
Pressure
Automatic if the
voltage
transmitted by
the sensor
returns to normal
Unit shuts down.
Alarm relay turns on.
Check Evaporator pressure transducer wiring. Confirm that 5 V
reference signal is available between IOB connector. Check for
disconnected, grounded, or shorted wiring. Check for condensation in
transducer connector.
ALM-217
Sensor Fault -
Economizer
Pressure
Automatic if the
voltage
transmitted by
the sensor
returns to normal
Unit shuts down.
Alarm relay turns on.
Check Economizer pressure transducer wiring. Confirm that 5 V
reference signal is available between IOB connector. Check for
disconnected, grounded, or shorted wiring. Check for condensation in
transducer connector.
ALM-218
Sensor Fault -
Diffuser Pressure
Automatic if the
voltage
transmitted by
the sensor
returns to normal
Unit shuts down.
Alarm relay turns on.
Check Diffuser pressure transducer wiring. Confirm that 5 V reference
signal is available between IOB connector. Check for disconnected,
grounded, or shorted wiring. Check for condensation in transducer
connector.
ALM-219
Sensor Fault - Oil
Sump Pressure
Automatic if the
voltage
transmitted by
the sensor
returns to normal
Unit shuts down.
Alarm relay turns on.
Check Oil Sump pressure transducer wiring. Confirm that 5 V reference
signal is available between IOB connector. Check for disconnected,
grounded, or shorted wiring. Check for condensation in transducer
connector.
ALM-220
Sensor Fault - Oil
Supply Pressure
Automatic if the
voltage
transmitted by
the sensor
returns to normal
Unit shuts down.
Alarm relay turns on.
Check Oil Supply pressure transducer wiring. Confirm that 5 V reference
signal is available between IOB connectors. Check for disconnected,
grounded, or shorted wiring. Check for condensation in transducer
connector.
ALM-221
Sensor Fault -
Compressor
Thrust Bearing
Oil Temp
Automatic if the
voltage
transmitted by
the sensor
returns to normal
Unit shuts down.
Alarm relay turns on.
Check sensor resistance.
Check for proper wiring between Compressor Thrust Bearing Oil Temp
Sensor and IOB connector. Check for disconnected, grounded, or
shorted wiring.
ALM-222
Sensor Fault –
Bearing Refrig
Supply Temp
Automatic if the
voltage
transmitted by
the sensor
returns to normal
Unit shuts down.
Alarm relay turns on.
Check sensor resistance.
Check for proper wiring between Bearing Refrig Supply Temp Sensor
and IOB connector. Check for disconnected, grounded, or shorted
wiring.
ALM-223
Sensor Fault –
Purge Comp
Suction Temp
Automatic if the
voltage
transmitted by
the sensor
returns to normal
Unit shuts down.
Alarm relay turns on.
Check sensor resistance.
Check for proper wiring between Purge Comp Suction Temp Sensor
and IOB connector. Check for disconnected, grounded, or shorted
wiring.
ALM-225
Sensor Fault –
Pump Inlet
Pressure
Automatic if the
voltage
transmitted by
the sensor
returns to normal
Unit shuts down.
Alarm relay turns on.
Check Pump Inlet pressure transducer wiring. Confirm that 5 V
reference signal is available between IOB connectors. Check for
disconnected, grounded, or shorted wiring. Check for condensation in
transducer connector.
ALM-226
Sensor Fault –
Bearing Inlet
Pressure
Automatic if the
voltage
transmitted by
the sensor
returns to normal
Unit shuts down.
Alarm relay turns on.
Check Bearing Inlet pressure transducer wiring. Confirm that 5 V
reference signal is available between IOB connectors. Check for
disconnected, grounded, or shorted wiring. Check for condensation in
transducer connector.
ALM-227
Sensor Fault –
Bearing Outlet
Pressure
Automatic if the
voltage
transmitted by
the sensor
returns to normal
Unit shuts down.
Alarm relay turns on.
Check Bearing Outlet pressure transducer wiring. Confirm that 5 V
reference signal is available between IOB connectors. Check for
disconnected, grounded, or shorted wiring. Check for condensation in
transducer connector.
ALM-228
Sensor Fault –
Common CHWS
Temp
Automatic if the
voltage
transmitted by
the sensor
returns to normal
Unit shuts down.
Alarm relay turns on.
Check sensor resistance.
Check for proper wiring between Common CHWS Temp Sensor and
IOB connector. Check for disconnected, grounded, or shorted wiring.
ALM-229
Sensor Fault –
Common CHWR
Temp
Automatic if the
voltage
transmitted by
the sensor
returns to normal
Unit shuts down.
Alarm relay turns on.
Check sensor resistance.
Check for proper wiring between Common CHWR Temp and IOB
connector. Check for disconnected, grounded, or shorted wiring.
ALM-230
Prestart Failure -
High Bearing
Temperature
Manual
Unit shuts down.
Compressor is not
allowed to start.
Alarm relay turns on.
Check Comp Bearing Temp in Temperature screen.
Check oil heater and oil cooler for proper operation.
Check for low oil level, partially closed oil supply valves, clogged oil
filters. Check the Comp Bearing Temp sensor wiring and accuracy to
IOB connector.
Check Comp Bearing Temp Alert setting.
Table 16 — PIC6 Alarm Codes* (cont)
ALARM CODE
DESCRIPTION
OF ALARM TEXT
RESET TYPE
ACTION TAKEN BY
THE CONTROL
POSSIBLE CAUSE