218
39203 Fan A2 VFD
Error, Circuit A
The Variable Frequency Drive (VFD)
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
None; warning only Automatic Check motor connections to the VFD; check
harness connections to the motor; confirm unit
configuration
41nnn Fan B1 VFD
Error, Circuit B
Fan B1 VFD Circuit B fault (see VFD
Alarms and Alerts section on
page 220)
No action unless
subcode =
013: over current
204: locked rotor
in which case circuit
will shut down
Automatic; reset is manual
for subcode 013 and 204
See Table 171 for VFD Alarm/Alert Codes
41203 Fan B1 VFD
Error, Circuit B
The Variable Frequency Drive (VFD)
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
None; warning only Automatic Check motor connections to the VFD; check
harness connections to the motor; confirm unit
configuration
42nnn Fan B2 VFD
Error, Circuit B
Fan B2 VFD Circuit B fault (see VFD
Alarms and Alerts section on
page 220)
No action unless
subcode =
013: over current
204: locked rotor
in which case circuit
will shut down
Automatic; reset is manual
for subcode 013 and 204
See Table 171 for VFD Alarm/Alert Codes
42203 Fan B2 VFD
Error, Circuit B
The Variable Frequency Drive (VFD)
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
None; warning only Automatic Check motor connections to the VFD; check
harness connections to the motor; confirm unit
configuration
04502 Loss of Communi-
cation with Auxil-
iary Board A
Alarm will trip if communication with
AUX Board A is lost
Circuit A will be shut
down immediately
Automatic when the commu-
nication is reestablished
If this condition is encountered, check the fol-
lowing items for faults:
• power supply to the Aux board
• local equipment network (LEN) wiring
04503 Loss of Communi-
cation with Auxil-
iary Board B
Alarm will trip if communication with
AUX Board B is lost
Circuit B will be shut
down immediately
Automatic when the commu-
nication is reestablished
04603 Loss of communi-
cation with Energy
Management
Board
Alarm will trip if communication with
Energy Management Module (EMM)
Board is lost
No action on the unit,
EMM functions will
not operate
Automatic when the commu-
nication is reestablished
If this condition is encountered, check the fol-
lowing items for faults:
• the EMM is installed (Main Menu
Con-
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
Table 168 — Alarm Details by Code (cont)
ALARM
CODE
ALARM NAME
CRITERIA
FOR TRIP
ACTION TAKEN
BY CONTROL
RESET
METHOD
POSSIBLE CAUSES/CORRECTIVE ACTIONS
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