Table 29 — Alarm and Alert Codes (cont)

ALARM/

ALARM

 

WHY WAS THIS

ACTION TAKEN

RESET

PROBABLE

ALERT

OR

DESCRIPTION

ALARM

BY CONTROL

METHOD

CAUSE

CODE

ALERT

 

GENERATED?

 

 

 

 

 

 

 

 

 

 

 

T112

Alert

Circuit A High Suction

If EXV is greater than

Circuit A shutdown after

Manual

Faulty expansion

 

 

Superheat

98%, suction superheat is

pumpdown complete.

 

valve or EXV board,

 

 

 

greater than 75 F (41.7 C)

 

 

low refrigerant

 

 

 

and saturated suction

 

 

charge, plugged fil-

 

 

 

temperature is less than

 

 

ter drier, faulty suc-

 

 

 

MOP for 5 minutes

 

 

tion gas thermistor

 

 

 

 

 

 

(T7) or cooler ther-

 

 

 

 

 

 

mistor (T5).

T113

Alert

Circuit B High Suction

If EXV is greater than

Circuit B shutdown after

Manual

Faulty expansion

 

 

Superheat

98% suction superheat is

pumpdown complete.

 

valve or EXV board,

 

 

 

greater than 75 F (41.7 C)

 

 

low refrigerant

 

 

 

and saturated suction

 

 

charge, plugged fil-

 

 

 

temperature is less than

 

 

ter drier, faulty suc-

 

 

 

MOP for 5 minutes

 

 

tion gas thermistor

 

 

 

 

 

 

(T8) or cooler ther-

 

 

 

 

 

 

mistor (T6).

T114

Alert

Circuit A Low Suction

If EXV is greater than

Circuit A shutdown after

Automatic restart

Faulty expansion

 

 

Superheat

10%, and either suction

pumpdown complete.

after first daily

valve or EXV board,

 

 

 

superheat is less than

 

occurrence.

faulty suction gas

 

 

 

superheat set point –10 F

 

Manual restart

thermistor (T7) or

 

 

 

(5.6 C) or saturated

 

thereafter.

cooler thermistor

 

 

 

suction temperature is

 

 

(T5).

 

 

 

greater than MOP for

 

 

 

 

 

 

5 minutes

 

 

 

T115

Alert

Circuit B Low Suction

If EXV is greater than

Circuit B shutdown after

Automatic restart

Faulty expansion

 

 

Superheat

10%, and either suction

pumpdown complete.

after first daily

valve or EXV board,

 

 

 

superheat is less than

 

occurrence.

faulty suction gas

 

 

 

superheat set point –10 F

 

Manual restart

thermistor (T8) or

 

 

 

(5.6 C) or saturated

 

thereafter.

cooler thermistor

 

 

 

suction temperature is

 

 

(T6).

 

 

 

greater than MOP for

 

 

 

 

 

 

5 minutes

 

 

 

T116

Alert

Circuit A Low Cooler

1. If the saturated suction

1. Mode 7 initiated. No addi-

1. Automatic reset

Faulty expansion

 

 

Suction Temperature

temperature is 24 to

tional capacity increases.

if corrected.

valve or EXV board,

 

 

 

29° F (13.3 to 16.1° C)

Alert not tripped.

 

low refrigerant

 

 

 

below cooler LWT and

 

 

charge, plugged fil-

 

 

 

is also 2° F (1.1° C)

 

 

ter drier, faulty suc-

 

 

 

less than freeze*

 

 

tion gas thermistor

 

 

 

2. If the saturated suction

2. Circuit shutdown without

2. Manual

(T7) or cooler ther-

 

 

 

temperature is 30° F

going through pumpdown.

 

mistor (T5), low

 

 

 

(16.7° C) below cooler

 

 

cooler fluid flow.

 

 

 

LWT and is also 2° F

 

 

 

 

 

 

(1.1° C) less than

 

 

 

 

 

 

freeze* for 10 minutes

 

 

 

T117

Alert

Circuit B Low Cooler

1. If the saturated suction

1. Mode 8 initiated. No addi-

1. Automatic reset

Faulty expansion

 

 

Suction Temperature

temperature is 24 to

tional capacity increases.

if corrected.

valve or EXV board,

 

 

 

29°F (13.3 to 16.1° C)

Alert not tripped.

 

low refrigerant

 

 

 

below cooler LWT and

 

 

charge, plugged fil-

 

 

 

is also 2°F (1.1° C)

 

 

ter drier, faulty suc-

 

 

 

less than freeze*

 

 

tion gas thermistor

 

 

 

2. If the saturated suction

2. Circuit shutdown without

2. Manual

(T8) or cooler ther-

 

 

 

temperature is 30° F

going through pumpdown.

 

mistor (T6), low

 

 

 

(16.7° C) below cooler

 

 

cooler fluid flow.

 

 

 

LWT and is also 2° F

 

 

 

 

 

 

(1.1° C) less than

 

 

 

 

 

 

freeze* for 10 minutes

 

 

 

T118

Alert

Circuit A Low Oil

Oil pressure switch open

Circuit shutdown without

Manual

Oil pump failure, low

 

 

Pressure

after 1 minute of continu-

going through pumpdown.

 

oil level, switch fail-

 

 

 

ous operation

 

 

ure or compressor

 

 

 

 

 

 

circuit breaker

 

 

 

 

 

 

tripped.

T119

Alert

Circuit B Low Oil

Oil pressure switch open

Circuit shutdown without

Manual

Oil pump failure, low

 

 

Pressure

after 1 minute of continu-

going through pumpdown.

 

oil level, switch fail-

 

 

 

ous operation

 

 

ure or compressor

 

 

 

 

 

 

circuit breaker

 

 

 

 

 

 

tripped.

 

 

 

 

 

 

 

 

LEGEND

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

*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.

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Carrier Air Conditioner specifications By Control Method Cause Code Alert GENERATED?, Ewt, Fsm, Lcw, Lwt, Mop, Wsm
Page 49 Page 51

Air Conditioner specifications

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