Sanyo 24KHS72 Service Manual - Page 48

Condition: E12

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(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. (Fig. 6) 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. Outdoor Unit 1 23456 Power 123 Indoor Unit Fig. 6 What is the latest self-diagnosis result ? Condition: E01 Defect in the outdoor unit P.C. board Condition: E12 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. (Fig. 7) 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. Outdoor Unit 1 23 456 123 Indoor Unit Fig. 7 Power What is the latest self-diagnosis result ? Condition: E12 Defect in the indoor unit P.C. board Condition: E01 Defect in the inter-unit cable 48

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(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 indoor
unit terminal strip.
(Fig. 7)
Defect in the indoor unit
P.C. board
Defect in the outdoor unit
P.C. board
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.
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.
(Fig. 6)
Defect in the inter-unit
cable
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.
Condition: E12
Condition: E01
Condition: E01
Condition: E12
What is the latest self-diagnosis result ?
What is the latest self-diagnosis result ?
1
2
4
3
5
6
1
2
3
Outdoor Unit
Fig. 6
Power
Indoor Unit
1
2
4
3
5
6
1
2
3
Power
Fig. 7
Outdoor Unit
Indoor Unit
48