Sanyo SAP-KRV96EH Technical & Service Manual page 38

(3) How to Identify a Serial Communication Error
If the lamps on the main body show the following conditions after the completion of self-diagnosis,
a communication error between the indoor unit and outdoor unit might be considered.
In such a case, identify the breakdown section by using the following procedure.
Refer to "Method of Self-Diagnosis" for the self-diagnosis procedure.
NOTE
Lamp LED Clean
Condition (3)
E01
E12
(3-1) Condition: E01
WARNING
Operate the air conditioner
in the "TEST RUN" mode.
Does the voltage
between the terminals 1 and 2
on the indoor unit terminal board
reach the rated value ?
No
1. Disconnect the inter-unit wiring on the indoor
unit side.
2. Operate the system in the "TEST RUN" mode.
Does the voltage
between the wires 1 and 2 of
inter-unit wiring on the indoor unit side
reach the rated value ?
No
An error in the P. C. Board in the
outdoor unit might be considered.
(Connection error between the P. C. Board in
the outdoor unit and J-B)
An error in the inter-unit wiring might be considered.
(ex. wire breaking or connection error, etc.)
Timer Operation
(2) (1)
For terminal board short circuit work or inter-unit wiring removal, turn off the power to
avoid an electric shock.
Remove the terminal board short circuit after the completion of self-diagnosis.
Yes
Yes
An error in the P. C. Board in the
indoor unit might be considered.
(Terminal board error, etc.)
: Off
: Blinking
: Illuminated
1. Short-circuit between the terminals 2 and 3
on the indoor unit terminal board.
2. Operate the system in TEST RUN mode. Then,
five minutes later, perform the self-diagnosis.
What is the self-diagnosis result ?
Condition: E01
1. Disconnect the inter-unit wiring on the outdoor
unit side.
2. Short-circuit between the terminals 2 and 3
on the out door unit terminal board.
3. Operate the system in TEST RUN mode. Then,
five minutes later, perform the self-diagnosis.
What is the self-diagnosis result ?
Condition: E01
An error in the P. C. Board in the
outdoor unit might be considered.
Connection error between the P. C. Board in
the outdoor unit and J-B)
38
Condition: E12
An error in the P. C. Board in the
indoor unit might be considered.
Condition: E12
An error in the inter-unit wiring
might be considered.
(ex. wire breaking or connection error, etc.)