Carrier AquaEdge 19DV Controls Operation And Troubleshooting page 37

DESCRIPTION
ALARM CODE
OF ALARM TEXT
Sensor Fault -
ALM-353 Heat Reclaim
Entering Temp
Sensor Fault -
ALM-354 Heat Reclaim
Leaving Temp
ISM Fault - Line
ALM-400
Voltage Dropout
ISM Fault - Line
ALM-401
Phase Loss
ISM Fault - High
ALM-402
Line Voltage
ISM Fault - Low
ALM-403
Line Voltage
ISM Fault - Line
ALM-404 Current
Imbalance
ISM Fault - Line
ALM-405 Voltage
Imbalance
ISM Fault -
ALM-406
Overload Trip
ISM Fault - Motor
ALM-407 Locked Rotor
Trip
ISM Fault -
ALM-408 Starter Lock
Rotor Trip
Table 16 — PIC6 Alarm Codes* (cont)
ACTION TAKEN BY
RESET TYPE
THE CONTROL
Automatic when
communication Unit shuts down.
comes back to Alarm relay turns on.
normal
Automatic when
communication Unit shuts down.
comes back to Alarm relay turns on.
normal
Unit shuts down.
Manual
Alarm relay turns on.
Unit shuts down.
Manual
Alarm relay turns on.
Unit shuts down.
Manual
Alarm relay turns on.
Unit shuts down.
Manual
Alarm relay turns on.
Unit shuts down.
Manual
Alarm relay turns on.
Unit shuts down.
Manual
Alarm relay turns on.
Unit shuts down.
Manual
Alarm relay turns on.
Unit shuts down.
Manual
Alarm relay turns on.
Unit shuts down.
Manual
Alarm relay turns on.
POSSIBLE CAUSE
Tested when the compressor is on whatever the run status and the
communication between Main board and IOBs is OK, If heat water
entering temperature is outside the range of -39.5 to 244.5°F
Tested when the compressor is on whatever the run status and the
communication between Main board and IOBs is OK, If heat water
entering temperature is outside the range of -39.5 to 244.5°F
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.
Any LINE VOLTAGE < 50% MOTOR RATED LINE VOLTAGE or there
is an excessive difference 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.
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.
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.
Current imbalance > CURRENT % IMBALANCE for greater than the
CURRENT IMBALANCE TIME. Check settings in ISM_CONF screen.
Check ISM_HIST screen. Check current transformer wiring leading to
ISM terminal block J4. Verify phase to phase and phase to ground line
voltage. 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.
Voltage Imbalance > VOLTAGE % IMBALANCE for greater than the
VOLTAGE IMBALANCE TIME. Check settings in ISM_CONF screen.
Check ISM_HIST screen. Check line voltage wiring leading to ISM
terminal block J3. Verify phase to phase and phase to ground line
voltage. Check wiring and hardware between building power supply and
motor.
Any phase current > 108% RLA for excessive time period. Alarm can
result from significant load side current imbalance when running at full
load. Check ISM_HIST screen. Check for consistent entering condenser
water temperature and water flow rates. Check MOTOR RATED LOAD
AMPS and STARTER LRA RATING in ISM_CONF screen. VFD
applications only: Any phase current > 120% for excessive time period.
Any LINE CURRENT > MOTOR LOCKED ROTOR TRIP for excessive
time while running after the LOCKED ROTOR START DELAY has
expired. Check MOTOR LOCKED ROTOR TRIP and MOTOR
CURRENT CT RATIO in ISM_CONF screen. Check motor nameplate
data. Check ISM_HIST screen. Check motor wiring and motor winding
resistance. Temporarily enable SINGLE CYCLE DROP OUT to capture
power disturbances.
Any LINE CURRENT > MOTOR LOCKED ROTOR TRIP for excessive
time while running after the LOCKED ROTOR START DELAY has
expired. Check MOTOR LOCKED ROTOR TRIP and MOTOR
CURRENT CT RATIO in ISM_CONF screen. Check motor nameplate
data. Check ISM_HIST screen. Check motor wiring and motor winding
resistance. Temporarily enable SINGLE CYCLE DROP OUT to capture
power disturbances.
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