Terminal Board Connections - Hisense Hi-Therma Series Service Handbook

8.2.10.3 TERMINAL BOARD CONNECTIONS

8.2.10.3.1 Indoor / outdoor transmission wiring
● The transmission is wired to terminals 1-2.
● The shielding layer shall be grounded.
● Use twist pair wires (0.75 mm²) for transmission wiring between outdoor unit and indoor unit. The wiring must consist of
2-core wires (Do not use wire with more than 3 cores).
● Use shielded wires for transmission wiring to protect the units from noise interference, with a length of less than 300 m
and a size in compliance with local codes.
● In the event that a conduit tube for field-wiring is not used, fix rubber bushes to the panel with adhesive.
Ensure that the transmission wiring is not wrongly connected to any live part that could damage the PCB.
8.2.10.3.2 Terminal board 1 (Main power supply)
The main power supply connection is wired to the Terminal board (TB1) as follows:
TB: Terminal board
CB: Air circuit breaker
ELB: Earth leakage breaker
TB2
Transmission cables
Shielded twisted pair
0.75 mm 2 x2
Fixed clamps
TB4 on PCB4
Fixed clamps
Power supply cables
Transmission cables
Field supplied, not contained in the indoor unit
220-240V ~ 50Hz
Heat pump
outdoor unit
TB1
Earth wire
Indoor unit
Outdoor unit
Shielded cable
ELB
CB
● Connect power line and earth wire to the harness.
●
Check and ensure live line and null line of terminal boards in
power supply are correctly connected. If connected incorrectly,
some parts may be damaged.
115
220-240V ~ 50Hz
ELB
CB
Earth wire
TB1
TB4 on PCB4
Heat pump
indoor unit
Master
controller
Installation