Sanyo C1271 Technical & Service Manual page 45

(3-2) Condition: E12
Troubleshooting Serial Communication
1. Turn off the power and wait until the power lamp (LED)
of the outdoor unit controller is turned OFF.
2. Disconnect the cable from the terminal 3 on the Outdoor
unit terminal strip.
1. Turn ON the power and operate the system using the
remote controller or the operation button on the indoor unit.
2. Perform the self-diagnosis five seconds after the operation
start.
What is the latest self-diagnosis result ?
1. Turn off the power and wait until the power lamp (LED)
of the outdoor unit controller is turned OFF.
2. Disconnect the cable from the terminal 3 on the indoor
unit terminal strip.
1. Turn ON the power and operate the system using the
remote controller or the operation button on the indoor unit.
2. Perform the self-diagnosis five seconds after the operation
start.
What is the latest self-diagnosis result ?
Defect in the indoor unit
P.C. board
(Fig. 6)
Condition: E12
(Fig. 7)
Condition: E12
1 2 3
1 2 3
Indoor Unit
Fig. 6
Condition: E01
Defect in the outdoor unit
P.C. board
1 2 3
1 2 3
Indoor Unit
Fig. 7
Condition: E01
Defect in the inter-unit
cable
45
Outdoor Unit
4 5 6
Power
Outdoor Unit
4 5 6
Power