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165
Table 79 —Alarm and Alert Codes (cont)
LEGEND
ALARM/
ALERT CODE
ALARM OR
ALERT
DESCRIPTION
ACTION TAKEN
BY CONTROL
RESET
METHOD
DETAILS PAGE
REFERENCE
A151
Alarm
Illegal Configuration - AUX Board
Incorrect Revision
Unit is not allowed to start
Automatic
173
Illegal Configuration - AUX Board Soft-
ware Rev Must be 3 or Higher
Illegal Configuration - AUX Board
should be AUX1, Not AUX2
Illegal Configuration - Control Type
Set to Invalid Type for Split
Illegal Configuration - Dual Thermostat
Type on Single Ckt Unit
Illegal Configuration - Dual Thermostat
and Switch Demand Limit
Illegal Configuration - Invalid Unit Size
Has Been Entered
Illegal Configuration - Unit Configura-
tion Set to Invalid Type
A152
Alarm
Unit Down Due to Multiple Failures
Unit is not allowed to start
Automatic
174
T153
Alert
Real Time Clock Hardware Failure
Occupancy Schedules are disabled. Unit
changes to Occupied and operates under
local control.
Automatic
174
A154
Alarm
Serial EEPROM Hardware Failure
Unit is shut down or is not allowed to start
Manual
174
T155
Alert
Serial EEPROM Storage Failure
None
Manual
174
A156
Alarm
Critical Serial EEPROM Storage
Failure Error
Unit is shut down or is not allowed to start
Manual
174
A157
Alarm
A/D Hardware Failure
Unit is shut down or is not allowed to start
Manual
174
T170
Alert
Loss of Communication with the
Compressor Expansion Module
Compressor Expansion Module functions
are disabled
Automatic
174
T173
Alert
Loss of Communication with the
Energy Management Module
Energy Managemet Module functions are
disabled
Automatic
174
T174
Alert
4-20 mA Cooling Setpoint
Input Failure
For
Configuration
o
OPT2
o
C.TYP=
7
without Return Air and Supply Air Thermis-
tors, unit is shut down or not allowed to
start.
For
Configuration
o
OPT2
o
C.TYP=
9
,
4-20 mA set point function is disabled.
For
Configuration
o
OPT2
o
C.TYP=
7
with
Return Air and Supply Air Thermistors, or
C.TYP=
9
, unit operates with Cooling Set
Point 1
Setpoints
o
COOL
o
CSP.1
as the
Active Set Point
Run Status
o
VIEW
o
SETP
Automatic
174
A175
Alarm
Loss of Communication with
AUX Board
AUX Board functions, digital compressor
and Motormaster
®
operations are disabled
Automatic
175
T176
Alert
4-20 mA Reset Input Failure
4-20 mA Cooling Temperature Reset
function is disabled
Automatic
175
T177
Alert
4-20 mA Demand Limit Failure
4-20 mA Cooling Demand Limit
function is disabled
Automatic
175
A200
Alarm
Indoor Fan Status Failure — Fan Not
Running
Unit is shut down or is not allowed to start
Automatic
175
T201
Alert
Circuit A Indoor Fan Status Failure —
Fan Not Running
Circuit is shut down or is not allowed
to start
Automatic
175
T202
Alert
Circuit B Indoor Fan Status Failure —
Fan Not Running
Circuit is shut down or is not allowed
to start
Automatic
175
T303
Alert
Coil — Scheduled Maintenance Due
None
Manual
175
T500
Alert
Current Sensor Board Failure — A1
Compressor A1 is shut down
Automatic
175
T501
Alert
Current Sensor Board Failure — A2
Compressor A2 is shut down
Automatic
175
T502
Alert
Current Sensor Board Failure — A3
Compressor A3 is shut down
Automatic
175
T503
Alert
Current Sensor Board Failure — B1
Compressor B1 is shut down
Automatic
175
T504
Alert
Current Sensor Board Failure — B2
Compressor B2 is shut down
Automatic
175
T505
Alert
Current Sensor Board Failure — B3
Compressor B3 is shut down
Automatic
175
A/D
—
Analog/Digital
AUX
—
Auxiliary
EEPROM —
Electrically Erasable Programmable Read-Only Memory