ー
5
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1. Communication error related
Fault diagnosis
1-2. [C17] or [Outdoor C17] error appears on [Alarm list] screen
1
Detection method
If the communication adaptor cannot receive data from the indoor or O/D unit for a certain period of time or
longer, or if an error is detected in the received data.
2
Diagnosis of failure
1. Unit
1-1
Is there a unit that is turned off?
Yes Turn on the
power
No 1-2
1-2
Is there looseness, a disconnection, an open circuit, or a short
circuit in the inter-unit control wiring connection?
Yes Correct
wiring
No
1-3
1-3 Are there any of the following types of deficiencies in the
construction of the inter-unit control wiring?
· Running in parallel with power lines
· Branch points exceed 16 places
· The total extension exceeds 1 km
· There is re-branching after branching
· There is a branch point with many branches (“star” or
“octopus” configuration)
· The distance between one branch point and the next branch
point is 2 m or less
· Defective termination resistance settings (too low or too high)
· When shielded wire is used, the shield is grounded on both
sides or not ground
ed
Yes Reconstruct
properly
No 2-1
2. Intelligent Controller
2-1
Is there looseness, a disconnection, an open circuit, or a
short-circuit in the wiring of 1, 2 (LINK1) or 4, 5 (LINK2) of the
Intelligent Controller's 27P terminal board?
Yes Correct
wiring
No
3
3. Replace the communication adaptor board for which there is an alarm
Or, replace the product main unit
1-3. [C19] error appears on [Alarm list] screen
1
Detection method
When there are multiple adaptors with the same address in one communication adaptor
control wiring system.
2
Diagnosis of failure
1. Communication
adaptor
1-1 Is there more than one adaptor with the same address in one
communication adaptor control wiring system?
Yes
Modify
settings *
No 2-1
2.
Communication
adaptor
control wiring
2-1
Are there any of the following types of deficiencies in the
construction of the communication adaptor control wiring?
·
Power lines and bundled lines or running in parallel
·
The total extension exceeds 1 km
·
It is not a crossover wiring (there is a branch point)
·
Shielded wire is not used
·
The shield is grounded on both sides or not grounded
Yes Reconstruct
properly
No
3
3. Replace the adaptor board for which there is an alarm
Or, replace the product main unit
* After correctly setting the adaptor address, perform [Check configuration] on the Intelligent
Controller screen, to confirm.
* [Check configuration] is displayed under [Settings] → [System settings].
1-4. [Disc.] error appears on [Alarm list] screen
1
Detection method
It is the same as for “1-1. [C06] error appears on [Alarm list] screen”. However, if an air conditioner is connected
to the communication adaptor, a “Disc.” error is displayed on that air conditioner (Indoor unit, Outdoor unit).
2
Diagnosis of failure
Refer to “
2
Diagnosis of failure” in 1-1.
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2017/04/06 10:42:40