35
Table 17 — PIC 5 Alarm Codes (cont)
ALARM
CODE
(ALARMRST)
ALARM TEXT
DESCRIPTION
RESET TYPE
ACTION TAKEN
BY CONTROL
POSSIBLE CAUSE
PRESSURE TRANSDUCER FAULTS (CONT)
Alm-218
ALM-218 Sensor Fault —
Diffuser Pressure
Automatic if the voltage measured by
the sensor returns to normal
Unit shuts down
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.
Check SW2 dip switch in IOB for the
channel configuration.
Alm-219
ALM-219 Sensor Fault —
Oil Sump Pressure
Automatic if the voltage measured by
the sensor returns to normal
Unit shuts down
Check oil sump pressure transducer wir-
ing.
Confirm that 5 v reference signal is
available between IOB connector.
Check for disconnected, grounded, or
shorted wiring.
Check for condensation in transducer.
Check SW2 dip switch in IOB for the
channel configuration.
Alm-220
ALM-220 Sensor Fault —
Oil Supply Pressure
Automatic if the voltage measured by
the sensor returns to normal
Unit shuts down
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.
Check SW2 dip switch in IOB for the
channel configuration.
PRESTART FAILURES
Alm-230
ALM-230 Prestart
Failure — High Bearing
Temperature
Manual
Unit shuts down.
Compressor is
not allowed to
start.
Check Comp Bearing Temp in Tem-
perature 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 compressor bearing tempera-
ture sensor wiring and accuracy to IOB
connector.
Check Comp Bearing Temp Alert setting.
Alm-231
ALM-231 Prestart
Failure — High Motor
Temperature
Manual
Unit shuts down.
Compressor is
not allowed to
start.
Check Comp Motor Wind Temp in Tem-
perature screen.
Check motor temperature sensor for wir-
ing and accuracy to IOB connector.
Check motor cooling line and isolation
valves for proper operation or restric-
tions, check refrigerant filter/drier.
Check for excessive starts within a short
time span.
Check Comp Motor Temp Override setting.
Alm-232
ALM-232 Prestart
Failure — High Discharge
Temperature
Manual
Unit shuts down.
Compressor is
not allowed to
start.
Check Comp Discharge Temp in Tem-
perature screen.
Allow compressor discharge tempera-
ture sensor to cool.
Check compressor discharge tempera-
ture sensor wiring to IOB connector.
Check for excessive starts.
Check Comp Discharge Alert setting.
Alm-233
ALM-233 Prestart
Failure — Low Refrigerant
Temperature
Manual
Unit shuts down.
Compressor is
not allowed to
start.
Check Evaporator Pressure, Evap Sat
Refrig Temp, and Evap Refrig Liquid
Temp in Temperature screen.
Check Evaporator Pressure transducer
and Evaporator Refrigerant Liquid Tem-
perature sensor wiring and accuracy to
IOB connector.
Check for low chilled water supply tem-
peratures.
Check refrigerant charge.
Check REFRIG OVERRIDE DELTA T
and EVAP REFRIG TRIPPOINT in Con-
figuration screen.