Content .. 4 5 6 7 ..

Carrier 30AWH004HB / 30AWH006HB / 30AWH008HB / 30AWH012HB. Service Manual - page 6

30AW

Diagnostic

Is the sensor correctly connected

(See Wiring Diagrams)

Are the resistance characteristics of the
temperature sensor normal

Correctly connect the Sensor

Replace defective Sensor

Check Inverter board - replace if defective *Check resistance table

Fault code 18 – G - Tr Short-circuit protection

Is the power supply (line) voltage correct

Are the inter-connections and cabling
correct

(See Wiring Diagrams)

Does relay RY01 operate

Correct the power supply voltage

Correct any inter-connecting or cabling
errors

Does the error code ‘Code 12 (o18

)’

appear when connector 3P is removed
from the compressor

Has the AC fuse fused

Replace PC

board

Replace PC board

Is compressor normal

Check/Replace PC board
defective

Replace defective
compressor - a rare short
circuit may have occurred

Fault code 17 – Inverter Air sensor fault

YES

14-03-2011 14:45:33

30AW

Diagnostic

Is the power supply cabling and sensor
cabling correct? (See Wiring Diagrams)

Check and correct cable

Check inverter board

Fault code 22 – Heat exchanger Sensors TE/TS

Are the sensors correctly connected?
(See Wiring Diagrams)

Are the resistance characteristics of the
temperature sensors normal?*

Correctly connect the Sensors

Replace defective Sensors

Check Inverter board - replace if defective *Check resistance table

Fault code 23 – Discharge Temperature Sensor

Is the sensor correctly connected?
(See Wiring Diagrams)

Are the resistance characteristics of the
temperature sensor normal?*

Correctly connect the Sensor

Replace defective Sensor

Check Inverter board - replace if defective *Check resistance table

Fault code 21 – Inverter current sensor fault

YES

14-03-2011 14:45:35

30AW

Diagnostic

Are connectors CN300, CN301, CN302 and CN303

connected

correctly?*

Is it possible to freely rotate the fan with hands when CN300,
CN301, CN302 & CN303 are disconnected?*

Normal resistance value between leads:
Between (1) (Red lead) and (2) (White lead)
Between (2) (White lead) and (3) (Black lead)
Between (3) (Black lead) and (1) (Red lead) on wind

ing

connector CN301 & CN303*

Normal resistance value between leads:
Between _ (Yellow lead) and _ (Pink lead) of motor connector

CN300 & CN302

Normal fan motor

Defective Fan Motor

* 30AW004-006-008 have only CN300 connector
For the nominal resistance value, check
the

relative

tables.

Note:
A Ground circuit error inside the motor is rarely detected
even with the above check.
When the circuit is not normal, even after replacing the
P.C. Board, replace the outdoor fan motor

Fault code Fault code 24 – Outdoor fan motor error– Compressor lock

Fan

Motor

Winding

Motor position

detection

CN301 CN300

30AWH012
30AWH015

CN303 CN302

30AWH004
30AWH006
30AWH008

CN300

YES

14-03-2011 14:45:36

30AW

Diagnostic

power supply voltage

Are the connections of cables and
connectors correct

Check and correct the
cabling & connections

Is the compressor
functional

Has there been a refrigerant
leak

Compressor lock - replace

Does the electronic expansion
valve operate normally

Check TE and TS Sensors, replace
if defective
Check expansion valve, replace if
defective

Check GMC & inverter Board – if
defective, replace

Fault code 28 – Discharge temperature error

Fault code 27 – Compressor lock

Is the protective control, such
as discharge temperature
release, normal

Are the connections of
cables and connectors
correct

Check and correct the
cabling & connections

Check parts, if defective
replace

Is the refrigerant charge correct

Does and overload condition exist

Are the resistance characteristics of the TD
sensor normal

Check and correct the
refrigerant charge

Delete the cause of
overload

Replace the TD sensor

Check Inverter board,
replace if defective

YES

YES YES

YES

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30AW

Diagnostic

Fault code 29 – Compressor break down

Is the power supply voltage normal

Does and overload condition exist

Is the current detected by the current sensor
normal

Correct the power supply
voltage

Delete the cause of
overload

Check and correct circuit
cables

Check P.C. boards, if
defective replace.

YES

14-03-2011 14:45:38

30AW

Diagnostic

Fault code 14 – High temperature release

Does the unit operate

Are the inter-connecting
cables correctly wired

Correct inter-connecting
cabling

Check P.C. Board - if
defect, replace

Are the connectors
correctly located

Ensure connectors are
located correctly

Does the voltage measured
between _and _ on the
terminal block (1,2,3) of
the unit vary

Is a DC Voltage of 280V
measured between the
terminals of the electrolytic
capacitor on inverter main
board

Replace inverter board

Is a DC Voltage of 7V
supplied to the CDB

Are

cables between Pin 2 and
Pin 5 on CN800 normal

Replace inverter board /
Ensure cabling is correct

Is case thermocouple
(CN500) connected

Connect thermocouple
CN500

Does case thermocouple
operate

Normal Fan Motor

Are the LEDs on receiver or
main board flashing

Check receiver board,
replace if defect

Check & Correct refrigerant
charge

Change GMC Board

** S5277G or equivalent (G or J type) (Diode
with rated voltage of 400V or more is
acceptable).

YES

* As shown below, perform
measurement within 20 seconds
of power ON

See DIODE data at the end of
session

** S5277G or equivalent (G or

J type) (Diode with rated
voltage of 400V or more is
acceptable).

Black

White

S5277G**

Inter - terminal block

14-03-2011 14:45:39

30AW

Diagnostic

6.4.1 Relational graph of temperature sensor resistance value and temperature

For 004, 006, 008, 012, sizes

TE,TO,TS

100

150

200

-30

-20

-10

Temperature [° C]

tence [k

]

T<10° C

tence [k ]

T >10° C

100

150

200

100

110 120 130 140

Temperature [° C]

tence [k ]

T<50° C

tence [k ]

T>50° C

TR, TA

Temperature [° C]

tenc e [k ]

14-03-2011 14:45:41

30AW

Diagnostic

For 004, 006, 008, 012, 015 sizes

Only 015 size

LWT,EWT

100

-35

-15

105

125

Temperature [° C]

tence [k ]

T<50° C

0.2

0.4

0.6

0.8

1.2

1.4

1.6

1.8

tence [k ]

T>50°C

TR, TA, TE, TS,TO

100

120

Temperature [° C]

tence [k ]

TD, TL

100

120

140

160

180

100

120

Temperature [° C]

tence [k ]

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30AW

Diagnostic

6.4.1 Resistance values of main components

T ref

[°C]

T ref

[°C]

T ref

[°C]

T ref

[°C]

T ref

[°C]

PMV

46±4

46±3

4 Way

1795±150

1765±150

1774±150

1489±150

Fan

motor

22±2

22.4±2

35.2±2

17.9±2

21.9±2

22.6±2

34.8±2

18.9±2

21.9±2

22.6±2

35±2

17.7±2

HP size: 4-6-8 kW

Pump: NYL 63-15

Main

246.1±20

177.4±20

108.8±10

Aux

137.8±10

T ref [°C]

°C

HP size: 12-15 kW

Pump: SXM 25-60

Main

144.7±15

107.3±10

70.9±7

Aux

72.8±7

T ref [°C]

°C

14-03-2011 14:45:44

30AW

Carrier

interfaces

7.1 Dry contacts control

The AquaSnap PLUS can use the following user interfaces:

ESZDPOUBDUT
UIF"RVB4OBQ1-64"83$SFNPUFDPOUSPMMFS

the 33AW-CS1 Comfort Series programmable thermostat
the Carrier Dealer Service Tool.

14-03-2011 14:45:45

30AW

Carrier

interfaces

7.2 33AW-RC1 user interface

WARNING:

#FGPSFJOTUBMMJOHUIFSFNPUFDPOUSPMMFSUVSOPòBMMQPXFSUPUIFVOJUUIBU

will supply power to the remote controller. Electrical shock can cause
personal injury or death.
- Open the remote controller rear mounting base to expose mounting

holes. The base can be removed to simplify mounting (snap apart
carefully at hinge to separate mounting base from remainder of the
remote controller).

- Route the remote controller wires through the large hole in the

mounting base. Level mounting base against wall (for aesthetic value
only).

- Mark the wall through the 2 mounting holes. Drill two 5 mm mounting

holes in wall where marked.

- Secure mounting base correctly to wall with 2 screws and anchors
provided, (additional anchoring holes available for more secure

mounting if needed) making sure all wires extend through hole in
mounting base.

- Adjust length and routing of each wire to reach the proper terminal in

the connector block on the mounting base. (Strip only 6 mm of

insulation from each wire to prevent adjacent wires from shorting

together when connected).

- Match and connect equipment wires to proper terminals in the
connector block.
- Both power and communication wires must be connected correctly for

proper remote controller operation.

- Push any excess wire into the wall and against mounting base..

14-03-2011 14:45:45

30AW

Carrier

interfaces

7.2.1 I/O features details

7.2.2 Main settings

On /Off

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used an external thermostat

Heat / Cool

- Fixed Water Set Point can be selected for Heat (code 113) and Cool

(code 115)

- Floating WSP based on OAT Climatic Curve can be selected (Installer

customized CC or predefined Carrier CC) code 112, 117-125

ECO

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(code 114) and Cool (code 116)

Night Mode

(Frequency Reduction) To reduce max noise, max frequency can be
reduced (code 5, 6)

Sanitary Hot Water

In case SHW dry contact input is exercised, unit is always moved in Heat

mode at the max WSP

Water Pump

For x and NX version, 230VAC WP output is on terminal block (230V 2A
max)

Alarm & Defrost

In case of Unit alarm or Defrost, an output is available on terminal block
(H version 230V, X version dry contact)

External Heat Source

When an EHS is requested a 230V output is energized to drive an
external heat source

SHW 3Way Valve

In case of SHW input is activated, unit is forced in heat mode at max
WSP and a 230 VAC 2A max output is available to drive, a 3WV

Alarm code

An alternate 5V signal is activated to point out on SUI the error code

CODE

33AW-RC1 AND DRY-CONTACTS SETTINGS

Unit ON/OFF mode input

146

0''PS$POUSPMMFE0òDZDMF

Heating & cooling mode input

302

Heat only, Cool only or Reversible

Leaving Water Temperature
(LWT) set-point

in heating

113

From + 20°C to +60°C

in cooling

115

From +4°C to +25°C

Climatic curve

112

No predefined Climatic Curve (Installer has to draw CC)
1-12 HTG CC
1-2 CLG CC
See Nui manual or paragraph 7.3.5 for climatic curve details.

Remote Out-door Air Temperature sensor

126

Enabled or disabled
(when disabled the 30AWH OAT sensor is enabled)

ECO mode input

in heating

114

From 1°C to 20°C lower than LWT set-point (113)

in cooling

116

From 1°C to 10°C higher than LWT set-point (115)

Night mode

input

005

Enabled or Disabled

frequency

006

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Sanitary Hot Water (SHW)

demand input

Enabled

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3W valve output

Enabled

External Heat Source / Defrost output

106

Alternative heat-source (e.g. gas-boiler) or Defrost output

Alarm or Terminal Fan-coil contact

147

Alarm or terminal Fan-coil

Alarm Defrost or humidity selection

108

Alarm Defrost or humidity selection

Water pump output

Enabled

For more details refer to specific manuals

7.3 33AW-CS1 User interface

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1. Service tool, for programming (customs settings) and diagnosis

purposes, when temporarily wired to the 30AWH…

2. All of the above, plus remote controller and programmer, when

installed in a room that is not representative of the indoor

temperature and relative humidity (e.g. basement, technical room,

garage, etc.).

3. All of the above, plus room thermostat and hygrostat, and many

customizable functions.

14-03-2011 14:46:01

30AW

Carrier

interfaces

Carrier’s NUI series programmable user interface is wall-mounted,
low-voltage user interface which maintains room temperature by
controlling the operation of a heating and/or air conditioning system.

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present versions. A variety of features are provided including separate
heating and cooling set-points, keypad lockout, backlighting, and built-
in installer test etc. Programming features include 7-day (all days the
same), 5/2 (Mon-Fri and Sat-Sun) and 1-day (all 7 days individually) with
2 or 4 or 6 periods per day.
This Installation Instruction covers installation, configuration, and
startup of NUI. For operational details, consult the Owner’s Manual.

WARNING:

#FGPSFJOTUBMMJOHUIFSFNPUFDPOUSPMMFSUVSOPòBMMQPXFSUPUIFVOJUUIBU

will supply power to the remote controller. Electrical shock can cause
personal injury or death.

User Interface Location

· Approximately 5 ft (1.5m) from floor.
· Close to or in a frequently used room, preferably on an inside

partitioning wall.

· On a section of wall without pipes or duct work.
User Interface should NOT be mounted
· Close to a window, on an outside wall, or next to a door leading to the

outside.

· Exposed to direct light or heat from the sun, a lamp, fireplace, or other

temperature-radiating objects which could cause a false reading.

· Close to or in direct airflow from supply registers and return-air

registers.

· In areas with poor air circulation, such as behind a door or in an alcove.

Install User Interface

Turn OFF all power to unit.

If an existing User Interface is being replaced:

a. Remove existing User Interface from wall.
b. Disconnect wires from existing User Interface, one at a time.
c. As each wire is disconnected, record wire colour and terminal
marking.
Open the NUI (mounting base) to expose mounting holes. The base

can be removed to simplify mounting. Press the thumb release at
thetop of the NUI and snap apart carefully to separate mounting
base from remainder of the NUI.
Route the NUI wires through large hole in mounting base. Level

mounting base against wall and mark wall through 2 mounting
holes.
Drill two 5mm mounting holes in wall where marked.

Secure mounting base to the wall with 2 anchors and screws

provided making sure all the wires extend through hole in the
mounting base.
Adjust length and routing of each wire to reach proper terminal and

connector block on mounting base with 6.5mm of extra wire. Strip
only 6.5mm of insulation from each wire to prevent adjacent wires
from shorting together when connected.
Match and connect equipment wires to proper terminals of the

connector blocks. Refer to wiring diagram for more details.
Push any excess wire into wall and against mounting base. Seal hole

JOXBMMUPQSFWFOUBJSMFBLT-FBLTDBOBòFDUPQFSBUJPO

Snap case back together. Attach thermostat to back plate by

10.

inserting tab on bottom edge and hinging up until top snap secures.
Close thermostat assembly making sure pins on back of circuit board

11.

align with sockets in connector.
Turn ON power to unit.

12.

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30AW

Carrier

interfaces

7.3.1 Main functions

7.3.2 Displayed icons

User functionality (comfort):

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tQPJOUNPEF)PNF4MFFQ"XBZ
t%JTQMBZPG

t$MJNBUJDEJTQMBZ3PPN50"55BOE3PPN3)
t5JNFBOEEBZPGUIFXFFL
t)FBUTPVSDF )FBU1VNQ/JHIU4)8&)4
t.PEF0ò0òXJUIIPNFBOUJGSFF[F)FBUBOE$PPM
t"MBSNT
t3PPNTFUQPJOUNPEF

t3PPN63TFUQPJOUUPESJWFB%FIVNJEJöFS)VNJEJöFS
t4DIFEVMJOHQFSJPETEBZSPPNTQNPEF)FBU1VNQ
t0O0òBOEOJHIUPQUJPO
t3PPNTFOTPSBEKVTUNFOU
t%JòFSFOUUFNQFSBUVSFWBMVFDBOCFEJTQMBZFE
t,FZQBEDBOCFMPDLFE
t4FUQPJOUDBOCFUFNQPSBSZPSQFSNBOFOUMZNPEJöFE
t4IPSUDVUUP/JHIUNPEF CVUUPO

for 10 sec)

t.VMUJQVSQPTFVTFS*OUFSGBDF$PNGPSU1SPHSBNNFS$POUSPMBOE4FSWJDF

tool

t.BJO$PNNJTTJPOJOHGFBUVSFT

t'PSDFPVUQVUTPOBOEUFTU)ZESBVMJDDJSDVJU DPEF
t%FöOFEJòFSFOUTZTUFNUZQFBOEVTFSJOUFSGBDF DPEF
t$POöHVSFUFSNJOBMCMPDLPVUQVUT DPEF
t8BUFSUFNQFSBUVSFTFUQPJOUTDMJNBUJDDVSWFT DPEFUP
t'SPTU1SPUFDUJPOTFUQPJOUT DPEF
t$POUSPMMFE0''TFUUJOH DPEF
t#BDLVQ)FBUFSTUSBUFHZ DPEF
t4BOJUBSZNPEFTFUVQ DPEF
t&YUFSOBM4FOTPSJOTUBMMFE DPEF

t.BJO4FSWJDFGFBUVSFT

t3FBE)FBU1VNQUFNQFSBUVSFT DPEFUP
t%JTQMBZ$PNQSFTTPS)[ DPEF
t%JTQMBZøPXTXJUDITUBUVT DPEF
t"MBSNIJTUPSZ DPEF
t%JTQMBZ$PNQSFTTPSXBUFSQVNQSVOUJNF DPEF

Room air
temperature

Heating mode

Cooling mode

Home anti-freeze
mode

Timer on

On / Off

Back-up EHS

mode

Outdoor air

temperature

Alarm

warning

Room relative
humidity %

Service
mode

Sanitary Hot
Water Mode

Time clock

Day of the week

and weekly timer

I am at home

mode

I am away

mode

I sleep

mode

Compressor ON / Frequency reduction

Humidifier / Dehumidifier

Activated

Child lock

14-03-2011 14:46:03

30AW

Carrier

interfaces

7.3.3 Control buttons

7.3.4 Codes table

Code Nr.

Name

DESCRIPTION

VALUE RANGE

STANDARD

Min

Max

MODE

This code is use to select the Unit Mode:

0ò

2. Cooling
3. Heating

0ò

HOME ANTIFREEZE

This code is use to enable the Home Atifreeze option when the

TZTUFNJT0ò

1. Disable

HOME ANTIFREEZE

TEMPERATURE

This code is use to select the threshold temperature value
under witch the Home Antifreeze protection starts (-0/+2 °C of
hysteresis).

6°C

12°C

6°C

ADJUST WATER

TEMPERATURE

SET-POINT

This code is use to adjust the water set-point changing the setted
climatic curve. The value setted modifies the maximum tempera-
ture of heating and cooling climatic curves.

-5°C

+5°C

0°C

FREQUENCY

REDUCTION MODE

This code is use to activate Silence / Frequency Reduction / Night
mode:
1. Not Active
2. Active

1. Not active

FREQUENCY

REDUCTION VALUE

This code is use to set the value of the outdoor unit frequency

SFEVDUJPOJO

(

)

ROOM MODE

This code is only displayed from the NUI based on room mode
selection:
1. Home
2. Sleep
3. Away

(

)

CONTROL ROOM

SET-POINT

This code displays the control room set-point set by the user.

12°C

38°C

20°C

(

)

ROOM AIR

TEMPERATURE

This code displays the room air temperature read by the internal
NUI Thermistor.

-20°C

50°C

(

)

RELATIVE HUMIDITY

SENSOR VALUE

This code displays the relative humidity value read by the internal
NUI sensor.

100

For more details refer to specific manuals.

Up &

down

Done

Away

Sleep

Home

Day/hour/min

Start time

Period

Days

Zone

Mode

Hold

14-03-2011 14:46:18

30AW

Carrier

interfaces

(

)

OUTDOOR

TEMPERATURE

This code displays the Outdoor Air Temperature. The valid OAT
value is used with this priority:
1. OAT from GMC thermistor (if it is installed)
2. OAT from inverter, read by TO sensor.

-30°C

90°C

(

)

GMC OUTDOOR AIR

TEMPERATURE

This code displays the Outdoor Air Temperature read by GMC
thermistor.

TEMPERATURE ROOM

SENSOR ADJUSTMENT

This code is use to adjust the temperature read by the sensor in
order to recover bad positioning of the user interface.

-5°C

+5°C

0°C

DAY PERIOD

This code is use to select how many period per day will be availa-
ble for the scheduling:
2
4
6

HOME HEAT TEMPE-

RATURE

With this code the User can select the HOME Temperature set-
point in Heating Mode

12°C

38°C

20°C

HOME COOL TEMPE-

RATURE

With this code the User can select the HOME Temperature set-
point in Cooling Mode

12°C

38°C

24°C

SLEEP HEAT

TEMPERATURE

With this code the User can select the SLEEP Temperature set-
point in Heating mode

12°C

38°C

18°C

SLEEP COOL

TEMPERATURE

With this code the User can select the SLEEP Temperature set-
point in Cooling Mode

12°C

38°C

26°C

AWAY HEAT

TEMPERATURE

With this code the User can select the AWAY Temperature set-
point in Heating mode

12°C

38°C

15°C

AWAY COOL

TEMPERATURE

With this code the User can select the AWAY Temperature set-
point in Cooling Mode

12°C

38°C

28°C

(

)

USER ROOM

SET-POINT

This code displays the room set-point that the user, pressing the
temporary/hold button, is selecting as temporary or hold.

12°C

38°C

20°C

(

)

FAULT CODE

This code displays the last fault code occurred.

(

)

FAULT HISTORY

This code displays the recent 4 fault codes stored.

100

SYSTEM TYPE

This code is use to set the System type:
1. A2W Monobloc fixed Water Temperature Value (dry contacts)
2. A2W Monobloc Climatic Curve setup (dry contacts)
3. A2W Monobloc Comfort with NUI
4. A2W Monobloc Comfort with NUI as Thermostat
5. N.A.
6. A2W Monobloc RS485
7. N.A.

1. A2W

101

USER INTERFACE TYPE

This code is use to define if NUI User Interface is used and how it
is used:
0. Not Used (Input Relay active/SUI)
1. NUI Installed
2. NUI used as programmer

0. Not used

102

(

)

NUI SOFTWARE

RELEASE

This code displays the NUI Software Release

103

(

)

NUI SOFTWARE

VERSION

This code displays the NUI Software Version

104

OUTPUT TEST

This code is use to force Output ON to test (max 10 minutes):

0. No test

1. Water pump

2. Alarm / Ambient temperature reached

3. External Heat Source / Defrost

4. Alarm + Defrost / Humidity

5. Trace Heater / Additional Water Pump

6. 3 Way valve

7. SUI Alarm

8. Blank

105

RESET PUMP

RUN-TIME

This code is use to reset the water pump timer to zero.

yes

106

EXTERNAL HEAT

SOURCE / DEFROST

This code is use to select the output connected at PIN 4 on
terminal strip:
1. External Heat Source
2. Defrost Output

107

HUMIDITY LIMIT

This code is use to define the humidity threshold limit to enable
the output for the external de-humidifier system.

100

Code Nr.

Name

DESCRIPTION

VALUE RANGE

STANDARD

Min

Max

14-03-2011 14:46:19

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