Self-Check Of The Indoor Unit Pcb (For Rpk Only) - Preliminary Information - Hitachi RCI-1.0FSN3 Service Manual

8 Troubleshooting

8.1 Self-check of the indoor unit PCB (for RPK only) - Preliminary information

• Self-check procedure using indoor PCB relays.
- To check faults on the indoor unit PCB due to malfunctioning.
To check faults on the indoor unit PCB according to the results of the self-check using the CHECK button on the
-
remote control and the auto-control function.
Enable switch 1 and disable switch 2
• Procedure
1 Turn off the main power supply switch.
2 Disconnect connectors CN7 and CN8.
3 Adjust the DIP DSWN switch as shown below.
4 Turn on the main power supply switch. Select the operating
mode (see below).
- Analogue test.
- Relay test.
5 On completion of the self-check, switch off the power supply
and restart the DIP switch.
Self-check procedures RPK-FN(H)2M
Check point
Start the expansion valve and
the automatic louver
Analogue test
Test on each relay
Conclusion
254
SMGB0077 rev.0 - 01/2013
Mode status
The expansion valve fully open → fully closed. Louver stopped
horizontally.
If the air inlet temperature thermistors, the air discharge tempe-
rature thermistors and the antifreeze protection are normal, go to
the next step of the procedure.
Fan 52H1, 2, 3
Low: Part of the wireless re-
ceiver.
Red: Part of the wireless re-
ceiver.
Green: Part of the wireless
receiver.
Yellow
Switch all DIP switches off and on as shown above.
Confirmation method
Check the ON/OFF sound of
the relays and that the LED is
on.