Checking By Means Of The 7-Segment Display - Hisense Hi-Therma Series Service Handbook

1.1.4 Checking by means of the 7-segment display

Simple checking procedure by means of the 7-segment display
1. Turn on the indoor unit connected to the outdoor unit.
2. Turn on the outdoor unit.
3. Auto-addressing starts.
During the auto-addressing, the following items can be checked 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.
● 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:
O.U.
A. The indoor unit is not supplied with power.
B. Disconnection of the operating line between the outdoor units.
I.U.
During the auto-addressing, the following items can be checked by means of the 7-segment display of the indoor unit.
Transmission between indoor and outdoor unit has been successfully
connected
Transmission failure between indoor and outdoor unit
Transmission failure between indoor and outdoor unit and Switch ON
any functions on master controller
Cause
Items
Indication
Indication
Enter normal operation display on I.U.
PCB1.
ROM Number of Indoor unit.
Outdoor unit power off or disconnection of
the operating line between the outdoor and
the indoor units.
Continues to flash after 40 seconds.
305
Troubleshooting
Remarks
Continues to flash after 30 seconds.
Continues to flash after 30 seconds.
Remarks