System information

35
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-236
ALM-236 Guide Vane 1 —
Calibration Not Completed
Manual
Unit shuts down.
Compressor is not
allowed to start.
Perform Guide Vane Calibration in
Quick Test screen.
Check guide vane actuator feed-
back potentiometer and wiring to
IOB connector.
PROTECTIVE LIMITS
Alm-250
ALM-250 Protective
Limit — Oil Pressure Dif-
ference Failure
Manual Unit shuts down.
Check oil pump.
Check oil filter.
Check oil pump wiring.
Alm-251
ALM-251 Protective
Limit — Low Chilled Water
Flow
Manual Unit shuts down.
Perform Chilled Water pump test in
Quick Test screen.
Check evaporator refrigerant liquid
temperature and leaving chilled
water temperature sensor accuracy
and wiring to IOB.
Check chilled water valves, pumps,
and strainers.
Check EVAP REFRIG TRIP-
POINT, EVAP APPROACH ALERT,
EVAP FLOW DELTA P CUTOUT,
and WATER FLOW VERIFY TIME
settings.
Check load resistors, optional water
flow switches or water flow delta P
transducer calibration and wiring to
IOB.
Check for 5.0 v reference voltage
between IOB connectors.
Alm-252
ALM-252 Protective
Limit — Low Condenser
Water Flow
Manual Unit shuts down.
Perform Condenser Water pump
test in Quick Test screen.
Check condenser pressure trans-
ducer and leaving condenser water
temperature sensor accuracy and
wiring.
Check condenser water valves and
strainers.
Check COND PRESS OVERRIDE,
COND APPROACH ALERT, COND
FLOW DELTA P CUTOUT, and
WATER FLOW VERIFY TIME set-
tings.
Check load resistors, optional water
flow switches or water flow delta P
transducer calibration and wiring to
IOB.
Check for 5.0 v reference voltage
between IOB connectors.