Carrier 30GTN Service And Troubleshooting Manual page 50

ALARM/ ALARM
ALEERT OR DESCRIPTION
CODE ALERT
150 Alarm Emergency Stop
151 Alarm Illegal Configuration
152 Alarm Unit Down Due to
Failure
153 Alarm Real Time Clock Hard-
ware Failure
154 Alarm Serial EEPROM Hard-
ware Failure
155 Alert Serial EEPROM Stor-
age Failure
156 Alarm Critical Serial
EEPROM Storage
Failure
157 Alarm A/D Hardware Failure
170 Alert Loss of Communica-
tion with CXB
172 Alarm Loss of Communica-
tion with EXV
173 Alert Loss of Communica-
tion with EMM
174 Alert 4 to 20 mA Cooling Set
Point Input Failure
176 Alert 4 to 20 mA Tempera-
ture Reset Input Fail-
ure
177 Alert 4 to 20 mA Demand
Limit Input Failure
200 Alarm Cooler Pump Interlock
Failure to Close at
Start-Up
201 Alarm Cooler Pump Interlock
Opened During Normal
Operation
202 Alarm Cooler Pump Interlock
Closed When Pump is
Off
Table 27 — Alarm and Alert Codes (cont)
WHY WAS THIS
ACTION TAKEN
ALARm
GENERATED?
CCN emergency stop Chiller shutdown with-
command received out going through
pumpdown.
One or more of the Chiller is not allowed to
illegal configurations start.
shown in the Note be-
low exists.
Both circuits are down Chiller is unable to run. Automatic once
due to alarms/alerts.
Internal clock on MBB Occupancy schedule
fails will not be used. Chiller
defaults to Local On
mode.
Hardware failure with Chiller is unable to run.
MBB
Configuration/storage No Action
failure with MBB
Configuration/storage Chiller is not allowed to
failure with MBB run.
Hardware failure with Chiller is not allowed to
peripheral device run.
MBB loses communi- Compressors A3, A4
cation with CXB and B3 and unloaders
A2/B2 unable to
operate.
MBB loses communi- Chiller shutdown with-
cation with EXV out going through
pumpdown.
MBB loses communi- 4 to 20 mA tempera-
cation with EMM ture reset disabled.
Demand Limit set to
100%. 4 to 20 mA set
point disabled.
If configured with EMM Set point function dis-
and input less than abled. Chiller controls
2 mA or greater than to CSP1.
22 mA
If configured with EMM Reset function dis-
and input less than abled. Chiller returns
2 mA or greater than to normal set point
22 mA control.
If configured with EMM Demand limit function
and input less than disabled. Chiller re-
2 mA or greater than turns to 100% demand
22 mA limit control.
If configured for cooler Cooler pump shut off.
pump control and Chiller shutdown with-
cooler pump interlock out going through
not closed within pumpdown.
1 minute after pump is
started
If configured for cooler Cooler pump shut off.
pump control and inter- Chiller shutdown with-
lock opens while cooler out going through
pump relay is on pumpdown.
If configured for cooler Chiller is not allowed to
pump control and inter- start.
lock closes while
cooler pump relay
is off
50
RESET
BY CONTROL METHOD
Automatic once CCN
command for EMSTOP
returns to
normal
Manual once configu-
ration errors are
corrected
alarms/alerts are
cleared that prevent
the chiller from
starting.
Automatic when cor-
rect clock control
restarts.
Manual
Manual
Manual
Manual
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Manual
Manual
Manual
PROBABLE
CAUSE
CCN Network
command.
Configuration error.
See Note on
page 49.
Alarm notifies user
that chiller is
100% down.
Main Base Board
failure.
Main Base Board
failure.
Potential failure of
MBB. Download cur-
rent operating soft-
ware. Replace MBB
if error occurs
again.
Main Base Board
failure.
Main Base Board
failure.
Wiring error, faulty
wiring or failed CXB
module.
Wiring error, faulty
wiring or failed EXV
module.
Wiring error, faulty
wiring or failed
Energy Manage-
ment Module (EMM).
Faulty signal generator,
wiring error, or faulty
EMM.
Faulty signal generator,
wiring error, or faulty
EMM.
Faulty signal generator,
wiring error, or faulty
EMM.
Failure of cooler pump
or controls.
Failure of cooler pump
or controls.
Failure of cooler pump
relay or interlock,
welded contacts.