Alarm And Alert Codes - Carrier AQUASNAP MPW015-045 Operation And Service Manual

30mpa liquid chillers with scroll compressors and comfortlink controls

Hide thumbs Also See for AQUASNAP MPW015-045:

Installation instructions manual (20 pages)

Table Of Contents

Table of Contents

ALARM/

ALARM

ALERT

DESCRIPTION

CODE

ALERT

Circuit A Compressor

A048

Alarm

Availability Alarm

Circuit A, Compressor 1

T051

Alert

Failure

Circuit A, Compressor 1

A051

Alarm

Failure

Circuit A, Compressor 2

T052

Alert

Failure

Circuit A, Compressor 2

A052

Alarm

Failure

Circuit A, Compressor 3

T053

Alert

Failure

Circuit A, Compressor 3

A053

Alarm

Failure

Cooler Leaving Fluid

A060

Alarm

Thermistor Failure

Cooler Entering Fluid

A061

Alarm

Thermistor Failure

T062

Alert

Condenser Leaving Fluid

Thermistor Failure

T063

Alert

Condenser Entering Fluid

Thermistor Failure

Circuit A Return Gas

T068

None

Thermistor Failure

Outside Air Thermistor

T073

Alert

Failure

Space Temperature/Dual Chiller

T074

Alert

Thermistor Failure

Circuit A Saturated

Suction Temperature

A077

Alarm

exceeds Cooler Leaving

Fluid Temperature

Lead/Lag LWT

T079

Alert

Thermistor Failure

Circuit A Discharge

A090

Alarm

Pressure Transducer Failure

Circuit A Suction

A092

Alarm

Pressure Transducer Failure

Discharge Gas

T094

Alert

Thermistor Failure

A110

Alarm

Circuit A Loss of Charge

Circuit A High Saturated

A112

Alarm

Suction Temperature

Circuit A Low Suction

A114

Alarm

Superheat

Table 38 — Alarm and Alert Codes

WHY WAS THIS

ALARM

GENERATED?

Two compressors on circuit

Circuit shut down

failed

Compressor feedback signal

Compressor A1 shut

does not match relay state

down.

Respective current sensor

board (CSB) feedback signal

Unit shut down

is ON when the compressor

should be off

Compressor feedback signal

Compressor A2 shut

does not match relay state

down.

Respective current sensor

board (CSB) feedback signal

Unit shut down

is ON when the compressor

should be off

Compressor feedback signal

Compressor A3 shut

does not match relay state

down.

Respective current sensor

board (CSB) feedback signal

Unit shut down

is ON when the compressor

should be off

Thermistor outside range of

Chiller shut down

–40 to 245 F (–40 to 118 C)

immediately

Thermistor outside range of

Chiller shut down

–40 to 245 F (–40 to 118 C)

immediately

Thermistor outside range of

Alert only.

–40 to 245 F (–40 to 118 C)

No action taken.

Thermistor outside range of

Alert only.

–40 to 245 F (–40 to 118 C)

No action taken.

If return gas sensors are

enabled (RG.EN) and

Circuit A shut down

thermistor is outside range of

–40 to 245 F (–40 to 118 C)

Temperature reset

Thermistor outside range of

disabled. Chiller runs

–40 to 245 F (–40 to 118 C)

under normal control/set

(if enabled)

points.

Temperature reset

Thermistor outside range of

disabled. Chiller runs

–40 to 245 F (–40 to 118 C)

under normal control/set

(if enabled)

points.

Faulty expansion valve,

Circuit A shutdown after

suction pressure transducer

pumpdown complete.

or leaving fluid thermistor.

Thermistor outside range of

Chiller runs as a stand

–40 to 245 F (–40 to 118 C)

alone machine

Outside of range (0 - 667 psig) Circuit A shut down

Outside of range (0 - 420 psig) Circuit A shut down

Discharge thermistor (DTT) is

Digital compressor shut

either open or shorted

down.

If the compressors are off

and discharge pressure

Circuit not allowed to

reading is < 26 psig for

start.

30 sec.

Circuit saturated suction

temperature pressure

Circuit shut down

transducer > 70 F (21.1 C)

for 5 minutes

Suction superheat is

less than 5° F (2.8 C) for 5

Circuit A shut down.

minutes. (if RGT installed)

ACTION TAKEN

RESET

BY CONTROL

METHOD

Manual

Automatic

Manual

Automatic

Manual

Automatic restart

after first daily

occurrence.

Manual restart

thereafter.

PROBABLE

CAUSE

Only one compressor

operating.

High-pressure switch open,

faulty CSB, loss of condenser