Carrier GTR040-420 Specifiche Scaricare il pdf (Pagina 55)

Table 31 — Alarm and Alert Codes (cont)

LEGEND *MOP = 50 F (10 C).

†Freeze is defined as 34° F (1.1 C) for water. For brine fluids, freeze

is CSP.3 minus 8 F (4.4 C).

ALARM/

ALERT

CODE

ALARM

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 less than 10%,

and either suction super-

heat 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 less than 10%,

and either suction super-

heat 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 opens

after 2 minutes of opera-

tion after start-up or

1 minute of continuous

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 opens

after 2 minutes of opera-

tion after start-up or

1 minute of continuous

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

1 2 ... 50 51 52 53 54 55 56 57 58 59 60 ... 103 104

Commenti su questo manuale

Nessun commento

Carrier GTR040-420 Specifiche Pagina 55

Commenti su questo manuale

Prodotti e manuali riguardandi no Carrier GTR040-420