Carrier AquaForce B Series Controls, Start-Up, Operation, Service And Troubleshooting Instructions page 218

ALARM
ALARM NAME
CODE
39203 Fan A2 VFD The Variable Frequency Drive (VFD)
Error, Circuit A has detected a missing motor and
generated a W203 Missing Motor
Warning. Motor curve parameters are
loaded to the fan VFD from the unit
controls so that a motor current can be
determined. If the current measured
does not correspond to the motor
curve amp draw for the given speed.
The unit controls will not generate the
alert until one of the following condi-
tions is met: 1. The Outdoor Ambient
Temperature is equal to or greater
than 50°F (10°C) and the VFD reports
the W203 Missing Motor Warning for
at least 30 seconds 2. The Outdoor
Ambient Temperature is less than
50°F (10°C) and the VFD reports the
W203 Missing Motor Warning for at
least 5 minutes
41nnn Fan B1 VFD Fan B1 VFD Circuit B fault (see VFD
Error, Circuit B Alarms and Alerts section on
page 220)
41203 Fan B1 VFD The Variable Frequency Drive (VFD)
Error, Circuit B has detected a missing motor and
generated a W203 Missing Motor
Warning. Motor curve parameters are
loaded to the fan VFD from the unit
controls so that a motor current can be
determined. If the current measured
does not correspond to the motor
curve amp draw for the given speed.
The unit controls will not generate the
alert until one of the following condi-
tions is met: 1. The Outdoor Ambient
Temperature is equal to or greater
than 50°F (10°C) and the VFD reports
the W203 Missing Motor Warning for
at least 30 seconds 2. The Outdoor
Ambient Temperature is less than
50°F (10°C) and the VFD reports the
W203 Missing Motor Warning for at
least 5 minutes
42nnn Fan B2 VFD Fan B2 VFD Circuit B fault (see VFD
Error, Circuit B Alarms and Alerts section on
page 220)
42203 Fan B2 VFD The Variable Frequency Drive (VFD)
Error, Circuit B has detected a missing motor and
generated a W203 Missing Motor
Warning. Motor curve parameters are
loaded to the fan VFD from the unit
controls so that a motor current can be
determined. If the current measured
does not correspond to the motor
curve amp draw for the given speed.
The unit controls will not generate the
alert until one of the following condi-
tions is met: 1. The Outdoor Ambient
Temperature is equal to or greater
than 50°F (10°C) and the VFD reports
the W203 Missing Motor Warning for
at least 30 seconds 2. The Outdoor
Ambient Temperature is less than
50°F (10°C) and the VFD reports the
W203 Missing Motor Warning for at
least 5 minutes
04502 Loss of Communi- Alarm will trip if communication with
cation with Auxil- AUX Board A is lost
iary Board A
04503 Loss of Communi- Alarm will trip if communication with
cation with Auxil- AUX Board B is lost
iary Board B
04603 Loss of communi- Alarm will trip if communication with
cation with Energy Energy Management Module (EMM)
Management Board is lost
Board
Table 168 — Alarm Details by Code (cont)
CRITERIA ACTION TAKEN
FOR TRIP BY CONTROL
None; warning only
No action unless
subcode =
013: over current
204: locked rotor
in which case circuit
will shut down
None; warning only
No action unless
subcode =
013: over current
204: locked rotor
in which case circuit
will shut down
None; warning only
Circuit A will be shut
down immediately
Circuit B will be shut
down immediately
No action on the unit,
EMM functions will
not operate
RESET
METHOD
Automatic
Automatic; reset is manual
for subcode 013 and 204
Automatic
Automatic; reset is manual
for subcode 013 and 204
Automatic
Automatic when the commu-
nication is reestablished
Automatic when the commu-
nication is reestablished
Automatic when the commu-
nication is reestablished
218
POSSIBLE CAUSES/CORRECTIVE ACTIONS
Check motor connections to the VFD; check
harness connections to the motor; confirm unit
configuration
See Table 171 for VFD Alarm/Alert Codes
Check motor connections to the VFD; check
harness connections to the motor; confirm unit
configuration
See Table 171 for VFD Alarm/Alert Codes
Check motor connections to the VFD; check
harness connections to the motor; confirm unit
configuration
If this condition is encountered, check the fol-
lowing items for faults:
• power supply to the Aux board
• local equipment network (LEN) wiring
If this condition is encountered, check the fol-
lowing items for faults:
• the EMM is installed (Main Menu

figuration Menu Factory Parameters

Line 9 Energy Management Module =
Yes)
• power supply to EMM
• address of the EMM
• local equipment network (LEN) wiring
If no EMM board is installed:
• confirm unit configuration to be sure that
no options requiring EMM are selected

Con-