System information

49
Table 16 — PIC 5 Alert Codes (cont)
ALERT CODE
(ALARMRST)
ALERT TEXT
DESCRIPTION
RESET TYPE
ACTION TAKEN BY
CONTROL
POSSIBLE CAUSE
SENSOR ALERTS (CONT)
Alt-135
ALT-135 Sensor Alert —
GuideVane Position
Automatic when the situation returns
to normal
Alert relay is ON.
Check guide vane position feed-
back.
Check guide vane actuator wiring.
Alt-136
ALT-136 Configuration
Error — Temp Reset
Automatic when the situation returns
to normal
Alert relay is ON.
Check temperature reset configura-
tions.
Alt-137
ALT-137 Configuration
Error — Controlled Water
Delta T Reset
Automatic when the situation returns
to normal
Alert relay is ON.
Check controlled water temperature
reset configurations.
Alt-138
ALT-138 Configuration
Error — Head Pressure
Automatic when the situation returns
to normal
Alert relay is ON.
Check head pressure configura-
tions.
PROCESS ALERTS
Alt-150
ALT-150 Process Alert —
Low Discharge Superheat
Automatic when the situation returns
to normal
Alert relay is ON.
Check for oil loss from compressor
or excess oil charge.
Check for excess refrigerant
charge.
Verify that the valves in the oil
reclaim lines are open.
Check oil reclaim strainers.
Check actual SUPERHEAT in Tem-
perature screen.
Alt-151
ALT-151 Process Alert —
High Evaporator Approach
Automatic when the situation returns
to normal
Alert relay is ON.
Check EVAP APPROACH ALERT
setting.
Check Evaporator Water Flow.
Check evaporator refrigerant liquid
temperature and leaving chilled
water temperature sensor resis-
tances and voltage drop.
Check evaporator refrigerant liquid
temperature and leaving chilled
water temperature sensor wiring to
the IOB terminal block.
Check for oil loss or low refrigerant
charge.
Check oil reclaim line isolation
valves and strainers.
Confirm that the optional refrigerant
liquid line isolation valve is open.
Check for float valve operation and
for refrigerant stacking in the con-
denser.
Check chilled water valves and
strainers.
Check for air in the evaporator
water box or division plate bypass.
Check for fouled tubes.
Confirm that the oil reclaim system
is working.
Take oil sample and check for min-
eral oil contamination.
Check for 20° F (11° C) tempera-
ture difference between leaving
chilled water and leaving con-
denser water.