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