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ALM-292
Protective Limit -
Guide Vane 2
Fault
Manual
Unit shuts down.
Alarm relay turns on.
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 4-20mA current
ALM-296
Protective Limit -
High Evaporator
Pressure
Manual
Unit shuts down.
Alarm relay turns on.
Check evaporator pressure sensor input And check evaporator
pressure cutout configurations
ALM-300
Loss
Communication
With ISM
Automatic when
communication
comes back to
normal
Unit shuts down.
Alarm relay turns on. Bus installation fault or defective slave board
ALM-301
Loss
Communication
With IOB1
Automatic when
communication
comes back to
normal
Unit shuts down.
Alarm relay turns on. Bus installation fault or defective slave board
ALM-302
Loss
Communication
With IOB2
Automatic when
communication
comes back to
normal
Unit shuts down.
Alarm relay turns on. Bus installation fault or defective slave board
ALM-303
Loss
Communication
With IOB3
Automatic when
communication
comes back to
normal
Unit shuts down.
Alarm relay turns on. Bus installation fault or defective slave board
ALM-304
Loss
Communication
With IOB4
Automatic when
communication
comes back to
normal
Unit shuts down.
Alarm relay turns on. Bus installation fault or defective slave board
ALM-305
Loss
Communication
With IOB5
Automatic when
communication
comes back to
normal
Unit shuts down.
Alarm relay turns on. Bus installation fault or defective slave board
ALM-306
Loss
Communication
With SIOB
Automatic when
communication
comes back to
normal
Unit shuts down.
Alarm relay turns on. Bus installation fault or defective slave board
ALM-307
LEN Scan Error
Manual
Unit shuts down.
Alarm relay turns on. Check LEN bus hardware physical wiring and software log
ALM-308
Loss
Communication
With VFD
Automatic when
communication
comes back to
normal
Unit shuts down.
Alarm relay turns on. Bus installation fault or defective slave board
ALM-309
Loss
Communication
With VFD
Gateway (LEN)
Automatic when
communication
comes back to
normal
Unit shuts down.
Alarm relay turns on. Bus installation fault or defective slave board
ALM-310
Loss
Communication
With VFD
(Modbus)
Automatic when
communication
comes back to
normal
Unit shuts down.
Alarm relay turns on. Bus installation fault or defective slave board
ALM-311
Loss
Communication
With Danfoss
VFD
Automatic when
communication
comes back to
normal
Unit shuts down.
Alarm relay turns on.
If (vfd_opt = 7) AND {LEN side Communication error with VFD lost for
14 [default, can be configurable] consecutive seconds}
ALM-350
Sensor Fault -
19DV 1st Bearing
Temp
Automatic when
communication
comes back to
normal
Unit shuts down.
Alarm relay turns on.
Check sensor resistance.
Check for proper wiring between 19DV 1st Bearing Temp Sensor and
IOB connector. Check for disconnected, grounded, or shorted wiring.
ALM-350
Sensor Fault -
19DV 1st Stage
Bearing Temp
Automatic when
communication
comes back to
normal
Unit shuts down.
Alarm relay turns on.
Tested when the compressor is on whatever the run status and the
communication between Main board and IOBs is OK, If compressor 1st
Bearing Temp is outside the range of -39.5 to 244.5°F. Check sensor
resistance.
Check for proper wiring between 19DV 2nd Bearing Temp Sensor and
IOB connector. Check for disconnected, grounded, or shorted wiring.
ALM-351
Sensor Fault -
19DV 2nd Stage
Bearing Temp
Automatic when
communication
comes back to
normal
Unit shuts down.
Alarm relay turns on.
Tested when the compressor is on whatever the run status and the
communication between Main board and IOBs is OK, If compressor 2nd
Bearing Temp is outside the range of -39.5 to 244.5°F. Check for proper
wiring between 19DV 2nd Bearing Temp Sensor and IOB connector.
Check for disconnected, grounded, or shorted wiring.
ALM-352
Sensor Fault -
19DV Pump
Outlet Pressure
Automatic when
communication
comes back to
normal
Unit shuts down.
Alarm relay turns on.
Check 19DV Pump Outlet Pressure transducer wiring. Confirm that 5 V
reference signal is available between IOB connector. Check for
disconnected, grounded, or shorted wiring. Check for condensation in
transducer connector.
Table 16 — PIC6 Alarm Codes* (cont)
ALARM CODE
DESCRIPTION
OF ALARM TEXT
RESET TYPE
ACTION TAKEN BY
THE CONTROL
POSSIBLE CAUSE