Carrier 42N_S - HDB Control System; HDB Control Connections; HDB Control Fault Codes; Electric Heater Integration

30
42N_S 42N_E
English
Power supply connection (g. 30)
t Make earth connection prior to any other electrical connections.
t Disconnect the power supply to all circuits prior to handling any
electrical components.
t Before proceeding with the unit connection to the mains supply locate
live L and neutral N, then make connections as shown in the gure 30
(ref. 25, 20).
t 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. 30, disconnect the I.R.
receiver cable of connector J5 (remote) ref. D.
t Connect the “CRC” cable ref. “E” in the box to connector J5 (remote)
ref. “D”.
Window (1WS) and presence (1ECO) control
(g. 30c)
The window and presence contacts must be connected to the terminal
block ref. 33 g. 30 according to the diagram.
Valve connection (g. 30d)
The valves must be connected to the terminal block ref. 33 g. 30
according to the diagram.
Grouping connection (g. 31)
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. 32)
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:
HDB Control
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
The electric heaters are controlled by CARRIER type “B” and “D” controls.
The electric heaters are equipped with two safety thermostats, one
with automatic reset, the second with manual reset, to protect the unit
against overtemperature that may happen in case of incorrect lter
cleaning or obstructions of the air ow.
NOTES:
t In the size 15 unit with “HIGH -LOW POWER” heating element,
the ULOW and LOW speed wire (RED AND YELLOW MOTOR WIRE)
must be disconnected and insulated.
t In case of failure in the electric fan, replace the electric heater too.
Only qualied personnel should carry out this operation.
To access the control box panel, remove the screw located at the
bottom of the cover and delicately bend the tab to remove the cover.
Connect the power supply to the electric heater terminal. Size the
cables according to current drawn (see table III “Technical data of
electric heater).
It is important not to obstruct the supply or air ow and to
periodically check that the lter is clean.
NOTE:
The simultaneous use of hot water and electric heater is possible
in “ONLY LOW POWER” mode. Electric heaters and hot water can
not be used in high power mode. To operate the additional heating
function you need to buy the 42N9084 kit and connect the special
sensor as described in the installation manual. After this, the
corresponding dip switch no. 5 of the type B control must be set to
ON.
Electric heater