Carrier 4 2 gw - HDB Control System; Power Supply and Connections; Fault Code Diagnosis; Low Energy Consumption Fan Motor

3742 GW
English
HDB Control
Power supply connection ÀJ
• Make earth connection prior to any other electrical connections.
• Disconnect the power supply to all circuits prior to handling any
electrical components.
• Before proceeding with the unit connection to the mains supply locate
live L and neutral N, then make connections as shown in the gure 40
(ref. 25, 20).
• The unit can be equipped with a “CRC” wire control or an I.R. control
which are supplied as accessories. If the "CRC" control is used
connected to the terminal block ref. 33 g. 40, disconnect the I.R.
receiver cable of connector J5 (remote) ref. D.
• Connect the “CRC” cable ref. “E” in the box to connector J5 (remote) ref.
“D”.
Window (1WS) and presence (1ECO) control
ÀJF
The window and presence contacts must be connected to the terminal
block ref. 33 g. 40 according to the diagram.
Fault Code Description Resettable
2 Air temperature sensor Yes
3 Changeover sensor Yes
4 Cold Draft thermistor Yes
5 Condensate pump error No
6 Electric heater conguration error Yes
7 EEprom error Yes
8 Chilled Beam conguration error Yes
Valve connection ÀJG
The valves must be connected to the terminal block ref. 33 g. 40
according to the diagram.
Grouping connection (g. 40a)
The communication card must be inserted into the special connector
“communication J8” provided on the card.
For more information refer to the manual provided with the grouping
kit.
Grouping conguration of several units (g. 40b)
Connect the units in daisy chain conguration (white and blue cables in
parallel) for grouping. Refer to the gure below.
Fault codes:
In the case of failure and with the unit ON, the red LED on the board
starts ashing according to the fault code: 0.5 seconds ON and 0.5
seconds OFF followed by 5 seconds OFF.
The fault code table is shown below:
Low Energy Consumption Fan Motor
Low Energy Consumption Fan Motor version
42GW…units can ensure a 0% - 100% constant air ow modulation (and
therefore the thermal and refrigerating capacity) thanks to the Inverter
technology combined with the last generation of high energy-ecient
electric motors (EC brushless). This enables a constant control on the
power supplied according to the room that need to be conditioned.
The result is 50% electric energy saving compared to traditional
3-speed asynchronous motors and a considerable reduction of acoustic
emissions.
The table below shows the electrical characteristics of the four types of
motors.
NOTE:
• The values showed on table are reported only at the Low Energy
Consumption Fan Motor to they are necessary add the control
input power which correspond about 5W, 9W for the pump and
3W or 6W for the valves (4 pipes).
The fan coil units of the series 42GW are submitted by Carrier to the NTC
control (see attached additional manual) for best regulation of room
temperature.
No further electrical connections are necessary (beside power supply
and communication bus) for this unit.(fIg. 39)
All connections between electric components and motor are factory
made.
209 309 409 509 609 709
LO
W7 7137 911
A 0.08 0.08 0.12 0.08 0.1 0.12
Hi
W2333572546115
A 0.19 0.27 0.46 0.23 0.4 0.89