Electrical Wiring; Compatibility; Alarm Code; Troubleshooting - Hitachi PC-ARF Technical Catalogue

6 Building air conditioning controls
HC-A64NET

6.3.3 Electrical wiring

Name Connection
X1 Power supply (1)
X3 Ethernet (1)
X4 H-LINK (1)
X5 RS485 (1)
X6 USB (1)
N O T E
(1): These cables must be field supplied.

DIP switch setting
Factory
Name Function
setting
SW1 Configuration

6.3.4 Compatibility

The new HC-A64NET is compatible with all SET-FREE, UTOPIA and CENTRIFUGAL units using H-LINK communication
protocol.
This device is not compatible with any of the following HITACHI controllers:
• Centralised remote controls
• Building air conditioning controls
• Other HITACHI BMS gateways (LONWORKS, BACNET, KNX, FIDELIO)
• Other units of the same model
N O T E
(*): HC-A64NET is compatible with CSNET Manager LT & XT.

6.3.5 Alarm code

Address 19 indicates alarm code as shown in indoor unit. Refer to Service Manual for the alarm explanation and repair
procedure in case of Indoor Unit or Outdoor Unit alarm.

6.3.6 Troubleshooting

ALARM CODE
LED2 is flickering Abnormal operation
621 621
TCGB0106 rev.0 - 12/2014
Use 0.75 mm wires which are not lighter than the polychloroprene sheathed flexible cord (code
2
designation 60245 IEC 57)
Category 5 or higher LAN cables
PC connection: Use a crossed cable (1 cable set available in Net configuration Kit, model code
7E513206) for direct connection.
LAN connection: Use a direct cable (field-supplied) for connection to a commercial distributor (Hub).
Twisted pair shielded cable 0.75 mm².
Shield must be grounded in one side only.
3 cores cable harness 0.75 mm² grounded in one side only. Use different colour for each cable.
USB Mini-B plug cable (1 cable set available in Net configuration Kit, model code 7E513206)
Description
SW1-1: Not used.
SW1-2: Not used (keep always "ON")
DESCRIPTION
Shut down the device power supply and restore it after 5 s. If LED2 is still flicker-
ing contact to the Hitachi customer service
Cable specification
COUNTERMEASURE
6