Initial Troubleshooting For Ivx An Es Series; Checking By Means Of The 7-Segment Display - Hitachi RAS-5HVRNM1E Service Manual

8 Troubleshooting

8.1 Initial troubleshooting for IVX an ES Series

8.1.1 Checking by means of the 7-segment display

Simple checking procedure by means of the 7-segment display
1 Turn on all the indoor units which are connected to the outdoor unit.
2 Turn on the outdoor unit
3 Auto-addressing starts. (Outdoor unit printed circuit board PCB1).
During the auto-addressing, you can check the following items by means of the 7-segment display of the outdoor unit.
• Disconnection of the power supply to the Indoor Unit.
• Disconnection of the operating line between the outdoor and the indoor units.
• Duplication of the Indoor Unit number.
• Normal case:
The 7-segment display of the outdoor unit is not indicated.
• Abnormal case:
If there is something wrong, the 7-segment display of the outdoor unit displays the following indications:
Cause
A. The indoor units are not supplied with power.
B. Disconnection of the operating line between the outdoor units
and the indoor units.
C. Duplicated settings of the indoor unit number on the rotary switch
RSW (Refer to the section Troubleshooting by alarm
page 207 for the description of the alarm code "35").
196
SMGB0060 rev. 1- 12/2010
Indication
03
03
code, see on —
Remarks
continues to flash after 30 seconds.
continues to flash after 30 seconds.
—