Carrier 19XRV specifications Unused State

ICVC FAULT

PRIMARY

SECONDARY

PRIMARY CAUSE

ADDITIONAL CAUSE/REMEDY

STATE

MESSAGE

MESSAGE

245

PROTECTIVE LIMIT

HIGH VFD SPEED

245→Actual VFD Speed

Actual VFD Speed on COMPRESS screen must

exceeded limit of Target VFD

not exceed Target VFD Speed by more than

Speed + 10%.

10%.

246

PROTECTIVE LIMIT

INVALID DIFFUSER

246→Diffuser Control Invalid

Check 25%, 50%, and 75% Guide Vane and Dif-

CONFIG.

Configuration: Check SETUP2

fuser Load Point entries in SETUP2 screen.

Entries.

247

PROTECTIVE LIMIT

DIFFUSER POSITION

247→Diffuser Position Fault:

Confirm that Diffuser Option in SETUP 2 screen

FAULT

Check Guide Vane/Diffuser

has not been Enabled if compressor does not

Actuator.

have a split ring diffuser. May indicate rotating

stall condition.

Check rotating stall transducer wiring accuracy

and sealing.

Check diffuser schedule and guide vane sched-

ule in SETUP2 screen.

Check for proper operation of diffuser and inlet

guide vane actuators including inlet guide vane

calibration.

Check diffuser actuator coupling for rotational

slip.

Check RC snubber on CCM J4-23 and J4-24.

Check 4.3k ohm resistor between CCM termi-

nals J3-7 and J3-8.

Check for electrical noise in CCM Diffuser Pres-

sure wiring. Do not continue to operate com-

pressor except for diagnostic purposes.

248

PROTECTIVE LIMIT

SPARE TEMPERATURE

248→Spare Temperature #1

Check Spare Temperature Enable and Spare

#1

[VALUE] exceeded limit of

Temperature Limit in SETUP1 Screen.

[LIMIT]*.

249

PROTECTIVE LIMIT

SPARE TEMPERATURE

249→Spare Temperature #2

Check Spare Temperature Enable and Spare

#2

[VALUE] exceeded limit of

Temperature Limit in SETUP1 Screen.

[LIMIT]*.

250

UNUSED

UNUSED

250→Unused State.

251

PROTECTIVE LIMIT

VFD CONFIG CONFLICT

251→VFD Config Conflict

The VFD_CONF table in the Gateway does not

(VFD Uploaded): Verify to

match that which is in the ICVC. This is a normal

Reset Alarm.

fault if an ICVC has been uploaded with soft-

ware when it was not attached to the CCM.

Enter VFD_CONF screen and then exit

VFD_CONF screen by pressing EXIT then

CANCEL. Re-enter the VFD_CONF screen,

press EXIT then SAVE. Parameters stored in

the Gateway will be uploaded into the ICVC.

Confirm valid settings in VFD_CONF screen.

252

PROTECTIVE LIMIT

VFD CONFIG CONFLICT

252→VFD Config Conflict

The VFD_CONF table in the Gateway does not

(VFD Downloaded): Verify to

match that which is in the ICVC.

Reset Alarm.

253

PROTECTIVE LIMIT

GUIDE VANE

253→Guide Vane Fault

Enter CONTROL TEST and execute Guide

CALIBRATION

[VALUE]. Check Calibration.

Vane Calibration.

Check CCM guide vane feedback terminals J4-9

and J4-10.

Check guide vane feedback potentiometer.

Alarm before start indicates guide vane opening

is not less than 4%. Alarm running indicates

guide vane position is < -1% or > 103%, or feed-

back voltage is < .045 or > 3.15 VDC.

254

PROTECTIVE LIMIT

VFD CHECKSUM ERROR

254→Checksum Error:

Actual VFD checksum does not match calcu-

Press Reset to Restore

lated value.

Configuration.

255

PROTECTIVE LIMIT

VFD DEW PREVENTION

255→Dew Prevention - Cool-

VFD COLDPLATE TEMP is too close to dew

ant Too Cold. Check Solenoid

point based on VFD ENCLOSURE TEMP and

& Cond T.

RELATIVE HUMIDITY in POWER screen.

Check for moisture in VFD enclosure.

Check Humidity Sensor in CONTROLS TEST.

Check for contamination on CCM J3-7 and J3-9

Humidity Sensor.

Check that VFD refrigerant cooling modulating

valve is closing.

256

PROTECTIVE LIMIT

INDUCTOR OVERTEMP

256→Inductor Overtemp Trip -

Check for cooling fan air flow obstructions.

Check Temp Switch and Cool-

ing Fans.

257

PROTECTIVE LIMIT

VFD START INHIBIT

257→VFD Start Inhibit: Check

The VFD Start Inhibit is derived from the Alarm

VFD Diagnostic Parameters

bit being set in the VFD. The conditions causing

212/214.

the alarm must be corrected in the VFD to

enable subsequent starts and operation. See

VFD parameters 212/214.

258

UNUSED STATE

UNUSED

258→Unused.