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Table 4 — ICVC Alert Codes (cont)
NORMAL RUN WITH OVERRIDES
*[LIMIT] is shown on the ICVC as the temperature, pressure, voltage, etc., set point predefined or selected by the operator as an override, alert, or
alarm condition. [VALUE] is the actual pressure, temperature, voltage, etc., at which the control tripped.
ICVC FAULT
STATE
PRIMARY
MESSAGE
SECONDARY
MESSAGE
PRIMARY CAUSE ADDITIONAL CAUSE/REMEDY
120 RUN CAPACITY
LIMITED
HIGH CONDENSER
PRESSURE
120Condenser Pressure
[VALUE] exceeded limit of
[LIMIT]*.
Check condenser water pump operation.
Check for high condenser water temperatures or
low flow rate. Verify that isolation valves are
open.
Check Cond Press Override setting in SETUP1.
121 RUN CAPACITY
LIMITED
HIGH MOTOR
TEMPERATURE
121Comp Motor Winding
Temp [VALUE] exceeded
limit of [LIMIT]*.
Check for closed valves or restriction in motor
cooling lines.
Check for closed refrigerant isolation valves.
Check Comp Motor Temp Override setting in
SETUP1.
122 RUN CAPACITY
LIMITED
LOW EVAP REFRIG
TEMP
122Evaporator Refrig
Temp [VALUE] exceeded
limit of [LIMIT]*.
Check refrigerant charge.
Check that optional cooler liquid line isolation
valve is fully open.
Check for excessive condenser flow or low
chilled water flow.
Check for low entering cooler temperature.
Check that condenser inlet and outlet water
nozzles are piped correctly.
Check for waterbox division plate gasket bypass.
123 RUN CAPACITY
LIMITED
HIGH COMPRESSOR
LIFT
123Surge Prevention
Override: Lift Too High For
Compressor
Check for high condenser water temperature or
low suction temperature.
Check for high Evaporator or Condenser
approaches.
Check surge prevention parameters in
OPTIONS screen.
124 RUN CAPACITY
LIMITED
MANUAL GUIDE VANE
TA RGET
124Run Capacity Limited:
Manual Guide Vane Target.
Target Guide Vane Position has been forced in
the COMPRESS screen. Select and RELEASE
force to return to normal (automatic) operation.
125 RUN CAPACITY
LIMITED
LOW DISCHARGE
SUPERHEAT
No Alert message. Check for oil loss or excess refrigerant charge.
Verify that the valves in the oil reclaim lines are
open.
126 RUN CAPACITY
LIMITED
HIGH RECTIFIER TEMP 126Rectifier Temperature
[VALUE] exceeded limit of
[LIMIT]*.
Check Rectifier Temp Override in SETUP1
screen.
Check that VFD refrigerant isolation valves are
open.
Check VFD refrigerant cooling solenoid.
Check for proper VFD cooling fan operation and
blockage.
127 RUN CAPACITY
LIMITED
MANUAL SPEED
CONTROL
No Alert message. Chiller is not in automatic temperature control.
128 RUN CAPACITY
LIMITED
HIGH INVERTER TEMP 128Inverter Temperature
[VALUE] exceeded limit of
[LIMIT]*.
Check Inverter Temp Override in SETUP1
screen.
Check that VFD refrigerant isolation valves are
open.
Check VFD refrigerant cooling solenoid.
Check for proper VFD cooling fan operation and
blockage.