System information

34
Table 15 — PIC 5 Alarm Codes (cont)
ALARM
CODE
(ALARMRST)
ALARM TEXT
DESCRIPTION
RESET TYPE
ACTION TAKEN BY
CONTROL
POSSIBLE CAUSE
PRESTART FAILURES (CONT)
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
Temperature screen.
Check motor temperature sensor
for wiring and accuracy to IOB con-
nector.
Check motor cooling line and isola-
tion valves for proper operation or
restrictions, 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
T e m p e r a t u r e s c r e e n .
Allow compressor discharge tem-
perature sensor to cool.
Check compressor discharge tem-
perature sensor wiring and accu-
racy to IOB connector.
Check for excessive starts.
Check Comp Discharge Alert set-
ting.
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 trans-
ducer and Evaporator Refrigerant
Liquid Temperature sensor wiring
and accuracy to IOB connector.
Check for low chilled water supply
temperatures.
Check refrigerant charge.
Check REFRIG OVERRIDE DELTA
T and EVAP REFRIG TRIPPOINT
in Configuration screen.
Alm-234
ALM-234 Prestart
Failure — Low Line Volt-
age
Manual
Unit shuts down.
Compressor is not
allowed to start.
Check ACTUAL LINE VOLTAGE.
Check UNDERVOLTAGE
THRESHOLD in ISM_CONF
screen.
Check voltage supply.
Check wiring to ISM J3-L1, J3-L2,
and J3-L3.
Check voltage transformers and
switch gear.
Consult power utility if voltage is
low.
Alm-235
ALM-235 Prestart
Failure — High Line Volt-
age
Manual
Unit shuts down.
Compressor is not
allowed to start.
Check ACTUAL LINE VOLTAGE.
Check OVERVOLTAGE THRESH-
OLD in ISM_CONF screen.
Check voltage supply.
Check voltage transformers and
switch gear.
Consult power utility if voltage is
high.