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Table 27 — Alarm and Alert Codes (cont)
ALARM/
ALEERT
CODE
ALARM OR
ALERT
DESCRIPTION
WHY WAS THIS
ALARm
GENERATED?
ACTION TAKEN
BY CONTROL
RESET
METHOD
PROBABLE
CAUSE
203
Alert
Loss of Communica-
tion with Slave Chiller
Master MBB loses
communication with
Slave MBB
Dual chiller control dis-
abled. Chiller runs as a
stand-alone machine.
Automatic
Wiring error, faulty wir-
ing, failed Slave MBB
module, power loss at
Slave chiller, wrong
slave address.
204
Alert
Loss of Communica-
tion with Master Chiller
Slave MBB loses com-
munication with Master
MBB
Dual chiller control dis-
abled. Chiller runs as a
stand-alone machine
Automatic
Wiring error, faulty wir-
ing, failed Master MBB
module, power loss at
Master chiller.
206
Alert
High Leaving Chilled
Water Temperature
LWT read is greater
than LCW Alert Limit,
Total capacity is 100%
and LWT is greater
than LWT reading one
minute ago
Alert only. No action
taken.
Automatic
Building load greater
than unit capacity, low
water/brine flow or
compressor fault.
Check for other
alarms/alerts.
207
Alarm
Cooler Freeze Protec-
tion
Cooler EWT or LWT is
less than freeze*
Chiller shutdown with-
out going through
pumpdown. Cooler
pump continues to run
(if control enabled).
Automatic for first
occurrence of day.
Manual reset
thereafter.
Faulty thermistor (T1/
T2), low water flow.
208
Alarm
Low Cooler Fluid Flow
Cooler EWT is less
than LWT by 3° F
(1.7° C) for 1 minute
after a circuit is started
Chiller shutdown with-
out going through
pumpdown. Cooler
pump shut off (if con-
trol enabled).
Manual
Faulty cooler pump,
low water flow, plugged
fluid strainer.
950
Alert
Loss of Communica-
tion with WSM
No communications
have been received by
MBB within 5 minutes
of last transmission
WSM forces removed.
Chiller runs under own
control.
Automatic
Failed module, wiring
error, failed trans-
former, loose connec-
tion plug, wrong
address.
951
Alert
Loss of Communica-
tion with FSM
No communications
have been received by
MBB within 5 minutes
of last transmission
FSM forces removed.
Chiller runs under own
control.
Automatic
Failed module, wiring
error, failed trans-
former, loose connec-
tion plug, wrong
address.
LEGEND
CCN
— Carrier Comfort Network
CPCS — Compressor Protection Control System
CXB
— Compressor Expansion Board
EMM
— Energy Management Module
EXV
— Electronic Expansion Valve
FSM
— Flotronic™ System Manager
MBB
— Main Base Board
MOP
— Maximum Operating Pressure
WSM
— Water System Manager
*Freeze is defined as 34° F (1.1 C) for water. For brine fluids, freeze
is CSP.1 −8° F (4.4 C) for single set point and lower of CSP.1/CSP.2
−8° F (4.4 C) for dual set point configuration.
NOTE: The following table shows illegal configurations:
1 Zero compressors in a circuit
2 Four compressors in a circuit with two unloaders
3
Four compressors in a circuit with one unloader and hot gas
bypass
4 Two unloaders and hot gas bypass in a circuit.
5 More than one compressor quantity difference between circuits
6 Fluid type of low temperature brine
7
Air cooled head pressure control with common fan staging and
different head pressure control methods for each circuit.
51
Summary of Contents for 30GTN
Page 6: ...Fig 1 Typical Control Box 080 110 and Associated Modular Units Shown 6 ...
Page 7: ...Fig 2 24 V Control Schematic Unit Sizes 040 070 7 ...
Page 8: ...Fig 3 24 V Control Schematic Unit Sizes 080 110 230B 315B 8 ...
Page 9: ...Fig 4 24 V Control Schematic Unit Sizes 130 210 230A 315A 330A B 420A B 9 ...
Page 75: ......