Carrier ComfortLink 6 Series Controls, Start-Up, Operation, Service, And Troubleshooting page 47

ALARM/ALERT ALARM OR
CODE ALERT
T142 Alert Compressor B1 –
High Oil Filter Pressure
Drop
T143 Alert Compressor B2 –
High Oil Filter Pressure
Drop
A150 Alarm Unit is in Emergency
Stop
A151 Alarm Illegal Configuration-x
A152 Alarm Circuit A&B Off for
Alerts. Unit down.
T153 Alert Real Time Clock Hard-
ware Failure
A154 Alarm Serial EEPROM Hard-
ware Failure
A155 Alarm Serial EEPROM Stor-
age Failure Error
A156 Alarm Critical Serial
EEPROM Storage Fail-
ure Error
A157 Alarm A/D Hardware Failure
A159 Alarm Loss of Condenser
Flow
A172 Alarm Loss of Communica-
tion with EXV Module
T173 Alert Loss of Communica-
tion with Energy Man-
agement Module
T174 Alert 4-20 mA Cool Setpoint
Input Failure
T175 Alert 4-20 mA Heat Setpoint
Input Failure
T176 Alert 4-20 mA Reset Input
Out of Range
T177 Alert 4-20 mA Demand Limit
Input Out of Range
A178 Alarm Loss of Communica-
tion with Screw Chiller
Module
A180 Alarm Loss of Communica-
tion with Compressor
Protection Module 1
A181 Alarm Loss of Communica-
tion with Compressor
Protection Module 2
Table 32  Alarm and Alert Codes (cont)
WHY WAS THIS
DESCRIPTION
ALARM GENERATED?
Oil filter pressure drop
(FD.B1) exceeds 25 psig
(172 kPa) for water-cooled
units or 30 psig (207 kPa) for
air-cooled and split system
units.
Oil filter pressure drop
(FD.B2) exceeds 25 psig
(172 kPa) for water-cooled
units or 30 psig (207 kPa) for
air-cooled and split system
units.
CCN command received to
shut unit down
Illegal Configuration has
been entered. Correction
needed.
Control has shut down both
circuits due to alerts.
Time not advancing on
board,
Internal failure of the
EEPROM.
Internal diagnostic has found
an error on critical data.
Internal diagnostic has found
an error on critical data.
A/D converter on the MBB
has failed.
Flow switch not closed within
1 minute after pump is
started or if flow switch opens
during normal operation for
> 10 sec.
MBB has lost communication
with the EXV Module
MBB has lost communication
with the Energy Manage-
ment Module when this
option is installed.
If configured and input signal
to EMM less than 2 mA or
greater than 22 mA.
If configured and input signal
to EMM less than 2 mA or
greater than 22 mA.
If configured and input signal
to EMM less than 2 mA or
greater than 22 mA.
If configured and input signal
to EMM less than 2 mA or
greater than 22 mA.
MBB has lost communication
with the Screw Chiller Module
MBB has lost communication
with the Compressor Protec-
tion Module 1
MBB has lost communication
with the Compressor Protec-
tion Module 2
ACTION TAKEN BY
CONTROL
None
None
Chiller shut down
Chiller cannot start.
None
Defaults to occupied
Machine shuts down
Machine shuts down
Machine shuts down
Machine shuts down
Chiller shut down.
Chiller shut down.
EMM options are
disabled.
Function disabled.
Normal set point used.
Function disabled.
Normal set point used.
Reset function dis-
abled. Normal set
point used.
Reset function dis-
abled. Normal set
point used.
Chiller shut down.
Chiller shut down.
Chiller shut down.
47
RESET
PROBABLE CAUSE
METHOD
Manual Filter change needed to pre-
vent machine from shutting
down.
Manual Filter change needed to pre-
vent machine from shutting
down.
CCN/ Network command
Automatic
Manual Configuration error.
See Table 33.
Automatic Check individual alarms.
Automatic Time clock not initialized or
board fail
Manual Replace Main Base Board.
Manual Re-download the software of
consider replacement of the
Main Base Board.
Manual Replace Main Base Board.
Manual Replace Main Base Board.
Manual Low condenser water flow,
failed condenser pump.
Automatic Failed EXV Module, wiring
error, loose connections, failed
transformer, wrong address.
Automatic Failed EMM, wiring error, loose
connections, failed transformer,
wrong address, wrong configu-
ration.
Automatic Faulty signal generator, wiring
error, loss of signal
Automatic Faulty signal generator, wiring
error, loss of signal
Automatic Faulty signal generator, wiring
error loss of signal
Automatic Faulty signal generator, wiring
error, loss of signal
Automatic Failed SCB Module, wiring
error, loose connections, failed
transformer, wrong address.
Automatic Failed CCP Module, wiring
error, loose connections, failed
transformer, wrong address.
Automatic Failed CCP Module, wiring
error, loose connections, failed
transformer, wrong address.