50
Table 29 — Alarm and Alert Codes (cont)
LEGEND *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 or
CSP.2 –8° F (4.4 C) for dual set point configuration.
ALARM/
ALERT
CODE
ALARM
OR
ALERT
DESCRIPTION
WHY WAS THIS
ALARM
GENERATED?
ACTION TAKEN
BY CONTROL
RESET
METHOD
PROBABLE
CAUSE
T112
Alert Circuit A High Suction
Superheat
If EXV is greater than
98%, suction superheat is
greater than 75 F (41.7 C)
and saturated suction
temperature is less than
MOP for 5 minutes
Circuit A shutdown after
pumpdown complete.
Manual Faulty expansion
valve or EXV board,
low refrigerant
charge, plugged fil-
ter drier, faulty suc-
tion gas thermistor
(T7) or cooler ther-
mistor (T5).
T113
Alert Circuit B High Suction
Superheat
If EXV is greater than
98% suction superheat is
greater than 75 F (41.7 C)
and saturated suction
temperature is less than
MOP for 5 minutes
Circuit B shutdown after
pumpdown complete.
Manual Faulty expansion
valve or EXV board,
low refrigerant
charge, plugged fil-
ter drier, faulty suc-
tion gas thermistor
(T8) or cooler ther-
mistor (T6).
T114
Alert Circuit A Low Suction
Superheat
If EXV is greater than
10%, and either suction
superheat is less than
superheat set point –10 F
(5.6 C) or saturated
suction temperature is
greater than MOP for
5 minutes
Circuit A shutdown after
pumpdown complete.
Automatic restart
after first daily
occurrence.
Manual restart
thereafter.
Faulty expansion
valve or EXV board,
faulty suction gas
thermistor (T7) or
cooler thermistor
(T5).
T115
Alert Circuit B Low Suction
Superheat
If EXV is greater than
10%, and either suction
superheat is less than
superheat set point –10 F
(5.6 C) or saturated
suction temperature is
greater than MOP for
5 minutes
Circuit B shutdown after
pumpdown complete.
Automatic restart
after first daily
occurrence.
Manual restart
thereafter.
Faulty expansion
valve or EXV board,
faulty suction gas
thermistor (T8) or
cooler thermistor
(T6).
T116
Alert Circuit A Low Cooler
Suction Temperature
1. If the saturated suction
temperature is 24 to
29° F (13.3 to 16.1° C)
below cooler LWT and
is also 2° F (1.1° C)
less than freeze*
2. If the saturated suction
temperature is 30° F
(16.7° C) below cooler
LWT and is also 2° F
(1.1° C) less than
freeze* for 10 minutes
1. Mode 7 initiated. No addi-
tional capacity increases.
Alert not tripped.
2. Circuit shutdown without
going through pumpdown.
1. Automatic reset
if corrected.
2. Manual
Faulty expansion
valve or EXV board,
low refrigerant
charge, plugged fil-
ter drier, faulty suc-
tion gas thermistor
(T7) or cooler ther-
mistor (T5), low
cooler fluid flow.
T117
Alert Circuit B Low Cooler
Suction Temperature
1. If the saturated suction
temperature is 24 to
29°F (13.3 to 16.1° C)
below cooler LWT and
is also 2°F (1.1° C)
less than freeze*
2. If the saturated suction
temperature is 30° F
(16.7° C) below cooler
LWT and is also 2° F
(1.1° C) less than
freeze* for 10 minutes
1. Mode 8 initiated. No addi-
tional capacity increases.
Alert not tripped.
2. Circuit shutdown without
going through pumpdown.
1. Automatic reset
if corrected.
2. Manual
Faulty expansion
valve or EXV board,
low refrigerant
charge, plugged fil-
ter drier, faulty suc-
tion gas thermistor
(T8) or cooler ther-
mistor (T6), low
cooler fluid flow.
T118
Alert Circuit A Low Oil
Pressure
Oil pressure switch open
after 1 minute of continu-
ous operation
Circuit shutdown without
going through pumpdown.
Manual Oil pump failure, low
oil level, switch fail-
ure or compressor
circuit breaker
tripped.
T119
Alert Circuit B Low Oil
Pressure
Oil pressure switch open
after 1 minute of continu-
ous operation
Circuit shutdown without
going through pumpdown.
Manual Oil pump failure, low
oil level, switch fail-
ure or compressor
circuit breaker
tripped.
CCN —
Carrier Comfort Network
CPCS —
Compressor Protection Control System
CXB —
Compressor Expansion Board
EMM —
Energy Management Module
EWT —
Entering Fluid Temperature
EXV —
Electronic Expansion Valve
FSM —
Flotronic™ System Manager
LCW —
Leaving Chilled Water
LWT —
Leaving Fluid Temperature
MBB —
Main Base Board
MOP —
Maximum Operating Pressure
WSM —
Water System Manager
