Carrier AquaEdge 19DV Controls Operation And Troubleshooting page 35

DESCRIPTION
ALARM CODE
OF ALARM TEXT
Protective Limit -
ALM-264 Diffuser Position
Fault
Protective Limit -
ALM-265
Refrigerant Leak
Protective Limit -
ALM-266
IOB Low Voltage
Protective Limit -
ALM-267 Guide Vane 1
Fault
Protective Limit -
ALM-268 Damper Valve
Fault
Protective Limit -
ALM-269 Envelope Control
Valve Fault
Protective Limit -
ALM-270 High Cond Water
Flow
Protective Limit -
ALM-271
Emergency Stop
Protective Limit -
ALM-272 ISM Config
Conflict
Protective Limit -
ALM-273 Swift Restarts
Limit Exceeded
Protective Limit –
ALM-274
Chiller Lockout
Protective Limit –
ALM-275
Fire Alarm
Protective Limit –
ALM-276
Stop Override
Protective Limit -
ALM-277
UI Freeze Reboot
Protective Limit -
ALM-278 VFD Config
Conflict
Protective Limit -
ALM-279 VFD Config
Failure
Protective Limit –
ALM-280
High VFD Speed
Protective Limit -
ALM-282 Displacement
Switch
Protective Limit -
ALM-283 High Pressure
Switch
Protective Limit -
ALM-284 Power Feedback
Loss
Protective Limit -
Low Bearing
ALM-285
Delta Pres
Difference
Table 16 — PIC6 Alarm Codes* (cont)
ACTION TAKEN BY
RESET TYPE
THE CONTROL
Unit shuts down.
Manual
Alarm relay turns on.
Unit shuts down.
Manual
Alarm relay turns on.
Unit shuts down.
Automatic
Alarm relay turns on.
Unit shuts down.
Manual
Alarm relay turns on.
Unit shuts down.
Manual Alarm relay turns on. Check damper valve wirings
Unit shuts down.
Manual Alarm relay turns on. Check Envelope Control valve wirings
Unit shuts down.
Manual Alarm relay turns on. Check condenser water pressure sensor and wirings
Unit shuts down.
Automatic
Alarm relay turns on.
Unit shuts down.
Automatic
Alarm relay turns on.
Unit shuts down.
Manual
Alarm relay turns on.
Unit shuts down.
Automatic
Alarm relay turns on.
Unit shuts down.
Automatic
Alarm relay turns on.
Unit shuts down.
Manual Alarm relay turns on. Check stop override point status in GENUNIT table
Unit shuts down.
Manual
Alarm relay turns on.
Unit shuts down.
Manual Alarm relay turns on. Reset shall be automatic when communication comes back to normal
Unit shuts down.
Manual Alarm relay turns on. Check VFD Configurations and save it again
Unit shuts down.
Manual
Alarm relay turns on.
Unit shuts down.
Manual Alarm relay turns on. Check impeller displacement switch for NGC chiller
Unit shuts down.
Manual Alarm relay turns on. Check high pressure switch for NGC chiller
Unit shuts down.
Manual Alarm relay turns on. Check Power Feedback Input
Unit shuts down.
Manual
Alarm relay turns on.
POSSIBLE CAUSE
Confirm that Diffuser Option in SRD Configuration screen has not been
Enabled if compressor does not have a split ring diffuser. May indicate
rotating stall condition.
Check rotating stall transducer wiring accuracy and sealing.
Check diffuser schedule and guide vane schedule in SRD Configuration
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 for electrical noise in IOB Diffuser Pressure wiring. Do not
continue to operate compressor except for diagnostic purposes.
REFRIGERANT LEAK OPTION is Enabled and the REFRIGERANT
LEAK SENSOR output exceeded REFRIGERANT LEAK ALARM mA.
Check for refrigerant leaks. Check leak detector for proper operation.
Check REFRIGERANT LEAK ALARM mA setting in the OPTIONS
screen. Check 4-20 mA or 1-5 V output from refrigerant leak sensor to
IOB J15-5Confirm that IOB SW2 dip switch 1 is in the correct position.
Check IOB 24VAC power supply and the transformer output voltage
Alarm before start indicates guide vane opening has not closed to less
than 4%. Alarm while running indicates guide vane position is < -1% or >
103%. Enter Quick Calibration and conduct Guide Vane Calibration.
Check wiring between the guide vane feedback potentiometer and IOB
terminals. Check the ohm guide vane position feedback potentiometer
or 4-20mA current
Check EMSTOP command form network and the remote stop dry
contact from IOB
Configuration data in controller and ISM are mismatch.
In maintains menu, choose "maintains ISM config" ->"Delete ISM
config"
NO – upload ISM configuration data to HMI
YES– download ISM configuration to ISM
Check the reason why swift restart happens so frequently.
Check chiller lockout input in IOB
Check fire alarm input in IOB
Power on reset Carrier SmartView
Check VFD actual speed
Alarm active if Bearing Delta P is less than 8 psi for 8s during Pre-lube/
Startup OR
When compressor is running the Bearing Delta P is less than 10 psig for
30s
35
TM controller