Hitachi PSC-A1T - DSW Setting and Led Indication; Troubleshooting

8
8.5.3.3 DSW Setting and led indication

Setting of DIP switches
DSW1: Not used
Factory setting
(Do not change)

LED indication
• Monitor led 1 is ON while PC-AMTB is power supplied.
• Monitor led 2 ickers from time to time when there is trafc at HLINK bus 1.
• Monitor led 3 ickers from time to time when IU is ON and there is trafc at HLINK bus 2.
• Monitor led 4 is used for system diagnosis.
8.5.4 Troubleshooting
The indoor unit is not recognized by the outdoor unit despite being powered ON.
Check that PC-AMTB is power-supplied by checking monitor LED1. If it is OFF, please check fuse state, and in case it is
fused, replace it by a 5x20 mm, 250 mA, 250V compatible fuse.
8 Control support devices
PC-AMTB
TCGB0106 rev.0 - 12/2014
741