109
Table 16 — ICVC Primary and Secondary Messages and
Custom Alarm/Alert Messages with Troubleshooting Guides (cont)
J. CHILLER ALERTS (cont)
*[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. "Exceeded Limit" in Alarm or Alert messages may mean the value is above or
below a threshold
.
STATE
PRIMARY
MESSAGE
SECONDARY
MESSAGE
PRIMARY CAUSE
ADDITIONAL
CAUSE/REMEDY
143
AUTORESTART
PENDING
LINE PHASE
LOSS
143->Line Current Loss; Check
ISM Fault History to Identify Phase
Any LINE VOLTAGE < 50% MOTOR RATED LINE VOLTAGE or there is
an excessive difference between the smallest LINE CURRENT and the
largest LINE CURRENT. AUTORESTART OPTION is Enabled, chiller is
automatically restarting. Check the ISM_HIST screen. Check MOTOR
RATED LINE VOLTAGE in ISM_CONF screen. Check phase to phase
and phase to ground power distribution bus voltage. Check current
transformer wiring leading to ISM terminal block J4 and line voltage wir-
ing leading to ISM terminal block J3. Check wiring and hardware
between building power supply and motor. Current imbalance may
improve if power or motor leads are rotated in the same phase
sequence. Consult power company. Medium voltage applications only:
Check voltage potential transformers and VOLT TRANSFORMER
RATIO in ISM_CONF screen.
144
AUTORESTART
PENDING
LINE VOLTAGE
DROPOUT
144->Single Cycle Line Voltage
Dropout
Temporary loss of voltage. SINGLE CYCLE DROPOUT and AUTORE-
START OPTION are Enabled, chiller is automatically restarting. Two
LINE VOLTAGES < 50% MOTOR RATED LINE VOLTAGE. Check
ISM_HIST screen. Disable Single Cycle Dropout in ISM_CONF screen.
Monitor chiller utility power for disruptions. Consult power company.
145
AUTORESTART
PENDING
HIGH LINE
VOLTAGE
145>High Average Line voltage
[VALUE]
High LINE VOLTAGE for an excessive amount of time. Check LINE
VOLTAGE in ISM_HIST screen. AUTORESTART OPTION is Enabled,
chiller is automatically restarting. Check MOTOR RATED LINE VOLT-
AGE and OVERVOLTAGE THRESHOLD in ISM_CONF screen. Check
phase to phase and phase to ground line power. Consult power com-
pany. Medium voltage applications only: Check voltage potential trans-
formers and VOLT TRANSFORMER RATIO in ISM_CONF screen.
Check wiring to ISM J3-VL1, J3-VL2 and J3-VL3.
146
AUTORESTART
PENDING
LOW LINE VOLT-
AGE
146->Low Average Line voltage
[VALUE]
Low LINE VOLTAGE for an excessive amount of time. AUTORESTART
OPTION is Enabled and chiller is automatically restarting. Check LINE
VOLTAGE in ISM_HIST screen. Check MOTOR RATED LINE VOLT-
AGE and UNDERVOLTAGE THRESHOLD in ISM_CONF screen.
Check phase to phase and phase to ground distribution bus voltage.
Consult power company. Medium voltage applications only: Check volt-
age potential transformers and VOLT TRANSFORMER RATIO in ISM_-
CONF screen. Check wiring to ISM J3-VL1, J3-VL2 and J3-VL3.
147
AUTORESTART
PENDING
STARTER MOD-
ULE RESET
147->Starter Module Power-On
Reset When Running
AUTORESTART OPTION in OPTIONS screen is enabled and there was
a temporary loss of 115 V ISM control voltage supply. Chiller will auto-
matically restart when power is restored within acceptable limits. Check
ISM_HIST screen. Check wiring leading to ISM terminals J1-LL1 and J1-
LL2. Check control power circuit breaker, control power transformer and
control power circuit fuses. Monitor chiller utility power for disruptions.
Improve ISM ground connection, apply measures to reduce electrical
noise to ISM. Consult power company.
148
AUTORESTART
PENDING
POWER LOSS
148->Control Power-Loss When
Running
AUTO RESTART OPTION in OPTIONS screen is Enabled and there
was a temporary loss of 24 VAC power to the ICVC. The chiller will auto-
matically restart when power is restored within acceptable limits. Check
115 VAC control power transformer. Check 24 VAC T2 transformer and
wiring leading to ICVC terminals J1-4 and J1-5 . Check CB1 circuit
breaker in the control panel. Check phase to phase and phase to ground
utility power voltage. Monitor chiller utility power for disruptions. Consult
power company.
149
SENSOR ALERT
HIGH DIS-
CHARGE TEMP
149->Comp Discharge Temp
[VALUE] Exceeded Limit of
[LIMIT]*
Check for proper inlet guide vane and optional diffuser actuator opera-
tion. Check COMP DISCHARGE ALERT threshold. Check for proper
condenser water flow and temperatures. Check for high lift or low load.
Check for closed compressor discharge isolation valve. Check if chiller
was operating in surge conditions. Check COMP DISCHARGE TEMP
sensor resistance or voltage drop. Check for proper wiring to CCM J4-17
and J4-18. Check for proper inlet guide vane and optional diffuser actua-
tor operation. Check for fouled tubes, plugged water strainers, or non-
condensibles in the chiller.
150
SENSOR ALERT
HIGH BEARING
TEMPERATURE
150->Comp Thrust Brg Temp
[VALUE] exceeded limit of [LIMIT]*
Check oil heater for proper operation, confirm that oil heater is de-ener-
gized when compressor is running. Check COMP THRUST BRG ALERT
threshold. Check for low oil level, partially closed oil line isolation valves,
or clogged oil filter. Check oil cooler refrigerant thermal expansion
valves, confirm that expansion valve bulbs are secured to the oil lines
and insulated. Check COMP THRUST BRNG TEMP sensor accuracy
and wiring to CCM J4-19 and J4-20. Check temperature after switching
to spare COMP THRUST BRNG TEMP sensor. This fault can result from
excessive operation at low load with low water flow to the evaporator or
condenser.
151
CONDENSER
PRESSURE
ALERT
PUMP RELAY
ENERGIZED
151->High Condenser Pressure
[VALUE]: Pump Energized to
Reduce Pressure.
Check for high Condenser Water temperatures, low water flow, fouled
tubes. Check CONDENSER PRESSURE OVERRIDE threshold. Check
for division plate/gasket bypass or plugged condenser water strainers.
Check for noncondensables in condenser. Check CONDENSER PRES-
SURE transducer wiring and accuracy to CCM J2-4 through J2-6. This
Alert is not caused by the High Pressure Switch.
152
RECYCLE ALERT
EXCESSIVE
RECYCLE
STARTS
152->Excessive recycle starts.
Chiller load is too low to keep compressor on line and there has been
more than 5 starts in 4 hours.
Increase chiller load, adjust hot gas bypass to open at a higher load,
increase recycle RESTART DELTA T in SETUP1 Screen. Check hot gas
bypass isolation valve position.
153
no message:
ALERT only
no message;
ALERT only
153->Lead/Lag Disabled: Dupli-
cate Chiller Address; Check Con-
figuration
Illegal chiller address configuration in LEADLAG screen. Lead chiller, lag
chiller, and optional standby chiller must all be on the same bus but they
must all be assigned a different address in the ICVC CONFIGURATION
screen.
Summary of Contents for AquaEdge 19XR series
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Page 161: ...161 Fig 69 Typical Low Voltage Variable Frequency Drive VFD Wiring Schematic 575 v ...
Page 162: ...162 Fig 69 Typical Low Voltage Variable Frequency Drive VFD Wiring Schematic 575 v cont ...
Page 186: ...186 APPENDIX B LEAD LAG WIRING 19XR Lead Lag Schematic Series Cooler Flow a19 1655 ...
Page 187: ...187 APPENDIX B LEAD LAG WIRING cont 19XR Lead Lag Schematic Parallel Cooler Flow a19 1717 ...