64
Table 10 - Alarm and alert messages (continued)
J. CHILLER ALERTS (continued)
IVVC
FAULT
STATE
PRIMARY MESSAGE
SECONDARY MESSAGE
ALARM MESSAGE
PRIMARY CAUSE
ADDITIONAL CAUSE/REMEDY
161
LOSS OF
COMMUNICATION
WITH WSM
163->WSM Cool Source -
Loss of Communication
Communications interrupted between supervisory
component and equipment component of WSM (Water
System Manager).
Check settings in WSMDEFME screen.
Check CCN communications link with WSM.
Check supervisory part of WSM.
162
SENSOR ALERT
EVAPORATOR APPROACH
160->Evaporator Approach
[VALUE] Exceeded Limit of
[LIMIT]*
Check that refrigerant charge level is adequate, waterbox
division plate gaskets are sealing, evapora¬tor tubes are
not fouled and that oil reclaim system is working.
Check sensor resistance or voltage drop.
Check for proper wiring.
Check Evap Approach Alert setting in SETUP1 screen.
163
SENSOR ALERT
CONDENSER APPROACH
161->Condenser Approach
[VALUE] Exceeded Limit of
[LIMIT]*
Check sensors resistance or voltage drop.
Check for proper wiring.
Check Cond Approach Alert setting in SETUP1 screen.
Check for noncondensable gas in the condenser.
Check that the condenser tubes are not fouled.
164
VFD SPEED ALERT
LOW VFD SPEED
164->Actual VFD Speed
exceeded limit of Target VFD
Speed –10%.
Actual VFD Speed on COMPRESS screen must be at
least 90% of Target VFD Speed.
165
AUTORESTART PENDING LOW DC BUS VOLTAGE
165->Low DC Bus Voltage:
[VALUE] Exceeded Limit of
[LIMIT]*
Verify phase to phase and phase to ground line voltage.
166
AUTORESTART PENDING HIGH DC BUS VOLTAGE
166->High DC Bus Voltage:
[VALUE] Exceeded Limit of
[LIMIT]*
Verify phase to phase and phase to ground line voltage.
Monitor AC line for high transient voltage conditions.
167
SENSOR ALERT
HIGH DISCHARGE TEMP
167->Comp Discharge Temp
[VALUE] Exceeded Limit of
[LIMIT]*
Check sensor resistance or voltage drop.
Check for proper wiring.
Check for excessive starts.
Check Comp Discharge Alert setting in SETUP1 screen.
168
SENSOR ALERT
HUMIDITY SENSOR INPUT
168->Sensor Fault: Check
Humidity Sensor Input
Check humidity sensor wiring on CCM connectors J3 and
J5. CCM switch SW2-1 must be in “OFF” position.
Check Humidity Sensor Input in Controls Test.
* [LIMIT] is shown on the ICVC as the temperature, pressure, voltage, etc., setpoint 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.
