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Alm-300 ALM-300 Loss Communication
With ISM
Automatic when the
communication comes back
to normal
Unit shuts down. Bus installation fault or defective slave board
Alm-301 ALM-301 Loss Communication
With IOB1
As above As above Bus installation fault or defective slave board
Alm-302 ALM-302 Loss Communication
With IOB2
As above As above Bus installation fault or defective slave board
Alm-303 ALM-303 Loss Communication
With IOB3
As above As above Bus installation fault or defective slave board As above
Alm-304 ALM-304 Loss Communication
With IOB4
As above As above Bus installation fault or defective slave board
Alm-305 ALM-305 Loss Communication
With IOB5
As above As above Bus installation fault or defective slave board
Alm-306 ALM-306 Loss Communication
With SIOB
As above As above Bus installation fault or defective slave board
Alm-307 ALM-307 LEN Scan Error Manual As above Check LEN bus hardware physical wiring and software log
Alm-308 ALM-308 Loss Communication
With VFD
Automatic when the
communication comes back
to normal
As above Bus installation fault or defective slave board
Alm-309 ALM-309 Loss Communication
With VFD Gateway (LEN)
As above As above Bus installation fault or defective slave board
Alm-310 ALM-310 Loss Communication
With VFD (Modbus)
As above As above Bus installation fault or defective slave board
Alm-350 Sensor Fault - 19DV 1st Stage
Bearing Temp
As above As above 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
Alm-351 Sensor Fault - 19DV 2nd Stage
Bearing Temp
As above As above 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
Alm-352 Sensor Fault - 19DV Pump
Output Pressure
As above As above Tested when the compressor is whatever the run status and the
communication between Main board and IOBs is ok, if Bearing Outlet
Transducer voltage outside
Alm-400 ALM-400 ISM Fault - Line
Voltage Dropout
Manual Unit shuts down. Temporary loss of voltage.
SINGLE CYCLE DROPOUT in the ISM_CONF screen is Enabled and
two LINE VOLTAGES < 50% MOTOR RATED LINE VOLTAGE.
Check ISM_HIST screen.
Disable Single Cycle Dropout in VFD_CONF screen.
Alm-401 ALM-401 ISM Fault - Line
Phase Loss
As above As above
Any LINE VOLTAGE < 50% MOTOR RATED LINE VOLTAGE or there
is an excessive dierence between the smallest LINE CURRENT and
the largest LINE CURRENT.
Check the ISM_HIST screen.
Check MOTOR RATED LINE VOLTAGE in ISM_CONF screen.
Check phase to phase and phase to ground power distribution bus
voltage.
Check current transformer wiring leading to ISM terminal block J4 and
line voltage wiring leading to ISM terminal block J3.
Check wiring and hardware between building power supply and motor.
Current imbalance may improve if power or motor leads are rotated in
the same phase sequence.
Consult power company.
Medium voltage applications only: Check voltage potential transformers
and VOLT TRANSFORMER RATIO in ISM_CONF screen.
Alm-402 ALM-402 ISM Fault - High Line
Voltage
As above As above High LINE VOLTAGE for an excessive amount of time.
Check LINE VOLTAGE in ISM_HIST screen.
Check MOTOR RATED LINE VOLTAGE and OVERVOLTAGE
THRESHOLD in ISM_CONF screen.
Check phase to phase and phase to ground distribution bus voltage.
Consult power company.
Medium voltage applications only: Check voltage potential
transformers and VOLT TRANSFORMER RATIO in ISM_CONF
screen. Check wiring to ISM J3-VL1, J3-VL2 & J3-VL3.
Alm-403 ALM-403 ISM Fault - Low Line
Voltage
As above As above
Low LINE VOLTAGE for an excessive amount of time.
Check LINE VOLTAGE in ISM_HIST screen.
Check MOTOR RATED LINE VOLTAGE and UNDERVOLTAGE
THRESHOLD in ISM_CONF screen.
Check phase to phase and phase to ground distribution bus voltage.
Check connections to ISM terminal block J3.
Consult power company.
Medium voltage applications only: Check voltage potential transformers
and VOLT TRANSFORMER RATIO in ISM_CONF screen.
Check wiring to ISM J3-VL1, J3-VL2 & J3-VL3.
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