beautypg.com

Carrier 19XRV User Manual

Page 16

background image

16

Table 5 — ICVC Alarm Codes (cont)

CHILLER PROTECTIVE LIMIT FAULTS (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.

ICVC FAULT

STATE

PRIMARY

MESSAGE

SECONDARY

MESSAGE

PRIMARY CAUSE

ADDITIONAL CAUSE/REMEDY

220

PROTECTIVE LIMIT GROUND FAULT

220

Ground Fault Trip;

Check Motor and Current
Sensors.

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.

221

PROTECTIVE LIMIT UNUSED

221

UNUSED

222

PROTECTIVE LIMIT LINE FREQUENCY TRIP

222

Line Frequency —

[VALUE] exceeded limit of
[LIMIT]; Check Power Supply.

If operating from a generator, check generator
size and speed.
Check utility power supply.

223

LOSS OF
COMMUNICATION

WITH VFD GATEWAY
MODULE

223

Loss of SIO Comm with

VFD Gateway: Check VFG
Module and Power.

Check VFD communication wiring and
connectors on VFD Gateway and DPI board.
Check for compatibility between ICVC and
Gateway software.

224

PROTECTIVE LIMIT VFD COMMUNICATIONS

FAULT

224

Loss of DPI Comm with

VFD Gateway: Check VFG to
VFD Comm.

Check VFD communication wiring and
connectors.
Check status lights on DPI Communications
Interface Board.
Call Carrier Service.

225

PROTECTIVE LIMIT MOTOR CURRENT

IMBALANCE

225

Motor Current Imbal-

ance: Check VFD Fault
History for Values.

Check Motor Current % Imbalance in
VFD_CONF screen.

226

PROTECTIVE LIMIT LINE PHASE REVERSAL

226

Line Phase Reversal:

Check Line Phases.

Reverse connections of any two line conductors
to circuit breaker.

227

PROTECTIVE LIMIT OIL PRESS SENSOR

FAULT

227

Oil Pressure Delta P

[VALUE] (Pump Off): Check
Pump/Transducers.

Check transducer wiring and accuracy.
Check power supply to pump.
Check pump operation.
Check transducer calibration.

228

PROTECTIVE LIMIT LOW OIL PRESSURE

228

Low Operating Oil

Pressure [VALUE]: Check Oil
Pump and Filter.

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.

229

PROTECTIVE LIMIT LOW CHILLED WATER

FLOW

229

Low Chilled Water Flow;

Check Switch/Delta P Config
& 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.

230

PROTECTIVE LIMIT LOW CONDENSER

WATER FLOW

230

Low Condenser Water

Flow; Check Switch/Delta P
Config & Calibration.

Perform pump control test.
Check optional transducer calibration and
wiring.
Check condenser water valves.
Check for COND PRESS OVERRIDE + 5 psig.

231

PROTECTIVE LIMIT HIGH DISCHARGE TEMP

231

Comp Discharge Temp

[VALUE] Exceeded Limit of
[LIMIT]*.

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.

232

PROTECTIVE LIMIT LOW REFRIGERANT

TEMP

232

Evaporator Refrig Temp

[VALUE] exceeded limit of
[LIMIT]*.

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.