Carrier 19XRV Start-Up And Service Instructions page 16

CHILLER PROTECTIVE LIMIT FAULTS (cont)
ICVC FAULT PRIMARY
STATE MESSAGE
220 PROTECTIVE LIMIT GROUND FAULT
221 PROTECTIVE LIMIT UNUSED
222 PROTECTIVE LIMIT LINE FREQUENCY TRIP
223 LOSS OF
COMMUNICATION
224 PROTECTIVE LIMIT VFD COMMUNICATIONS
225 PROTECTIVE LIMIT MOTOR CURRENT
226 PROTECTIVE LIMIT LINE PHASE REVERSAL
227 PROTECTIVE LIMIT OIL PRESS SENSOR
228 PROTECTIVE LIMIT LOW OIL PRESSURE
229 PROTECTIVE LIMIT LOW CHILLED WATER
230 PROTECTIVE LIMIT LOW CONDENSER
231 PROTECTIVE LIMIT HIGH DISCHARGE TEMP 231Comp Discharge Temp
232 PROTECTIVE LIMIT LOW REFRIGERANT
*[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.
Table 5 — ICVC Alarm Codes (cont)
SECONDARY
MESSAGE
220Ground Fault Trip;
Check Motor and Current
Sensors.
221UNUSED
222Line Frequency —
[VALUE] exceeded limit of
[LIMIT]; Check Power Supply.
WITH VFD GATEWAY 223Loss of SIO Comm with
MODULE VFD Gateway: Check VFG
Module and Power.
224Loss of DPI Comm with
FAULT VFD Gateway: Check VFG to
VFD Comm.
225Motor Current Imbal-
IMBALANCE ance: Check VFD Fault
History for Values.
226Line Phase Reversal:
Check Line Phases.
227Oil Pressure Delta P
FAULT [VALUE] (Pump Off): Check
Pump/Transducers.
228Low Operating Oil
Pressure [VALUE]: Check Oil
Pump and Filter.
229Low Chilled Water Flow;
FLOW Check Switch/Delta P Config
& Calibration.
230Low Condenser Water
WATER FLOW Flow; Check Switch/Delta P
Config & Calibration.
[VALUE] Exceeded Limit of
[LIMIT]*.
232Evaporator Refrig Temp
TEMP [VALUE] exceeded limit of
[LIMIT]*.
PRIMARY CAUSE
Check for condensation on motor terminals.
Check motor power leads for phase to phase or
phase to ground shorts. Disconnect motor from
VFD and megger motor.
Call Carrier Service.
If operating from a generator, check generator
size and speed.
Check utility power supply.
Check VFD communication wiring and
connectors on VFD Gateway and DPI board.
Check for compatibility between ICVC and
Gateway software.
Check VFD communication wiring and
connectors.
Check status lights on DPI Communications
Interface Board.
Call Carrier Service.
Check Motor Current % Imbalance in
VFD_CONF screen.
Reverse connections of any two line conductors
to circuit breaker.
Check transducer wiring and accuracy.
Check power supply to pump.
Check pump operation.
Check transducer calibration.
Check transducer wiring and accuracy.
Check power supply to pump.
Check pump operation.
Check oil level.
Check for partially closed service valves.
Check oil filters.
Check for foaming oil at start-up.
Check transducer calibration.
Perform pump control test.
Check optional transducer calibration and
wiring.
Check Evaporator Refrigerant Temperature
sensor.
Check chilled water valves.
Check for evaporator saturation temperature
< 34 F if not in Pumpdown Lockout mode. Place
unit in Pumpdown mode before removing
charge.
Perform pump control test.
Check optional transducer calibration and
wiring.
Check condenser water valves.
Check for COND PRESS OVERRIDE + 5 psig.
Check for closed compressor discharge isola-
tion valve.
Check if chiller was operating in surge.
Check sensor resistance or voltage drop.
Check for proper wiring.
Check for proper condenser flow and
temperature.
Check compressor discharge isolation valve.
Check for proper inlet guide vane and optional
diffuser actuator operation.
Check for proper refrigerant charge.
Check float valve operation.
Check for closed condenser liquid line isolation
valve. If problem occurs at high load, check for
low condenser pressure which causes inade-
quate flasc orifice differential pressure.
Check for proper water flow and temperature.
Confirm that condenser water enters bottom row
of condenser tubes first.
Check Evaporator Refrigerant Temperature
sensor.
Check for division plate gasket bypass.
Check for fouled tubes.
16
ADDITIONAL CAUSE/REMEDY