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
OPT2
C.TYP=7
without Return Air and Supply Air Thermis-
tors, unit is shut down or not allowed to
start.
For Configuration
OPT2
C.TYP=9,
4-20 mA set point function is disabled.
For Configuration
OPT2
C.TYP=7 with
Return Air and Supply Air Thermistors, or
C.TYP=9, unit operates with Cooling Set
Point 1 Setpoints
COOL
CSP.1 as the
Active Set Point Run Status
VIEW
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
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