ー
12
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3. Unit operation related
Fault diagnosis
3. Unit operation related
3-1. The Schedule Timer does not work properly
3-2. Unit does not stop (operate) even when Batch stop (startup) input is ON
1. Intelligent
Controller
1-1
Have you definitely set [Oper./Status] → [Set schedule]?
Yes 1-2
No
Apply settings
1-2
Is the timer selected for the indoor unit?
Yes
1-3
No
Select
1-3 Is that day set as an area holiday or timer special day for that
indoor unit?
* Area holidays and timer special days work with a dedicated timer
Yes
(END)
No
1-4
1-4 Is the current date / time setting correct?
Yes
1-5
No Correct the
settings
1-5 Did the following happen at the time of the timer?
· Power outage of indoor unit
· Power outage of Intelligent Controller
· Power outage of communication adaptor
· Communication error with air conditioner due to other causes
Yes
(END)
No
1-6
1-6 Is it set so that the units in one O/D unit system are in different
cooling / warming modes?
(Not allowed because of mismatch of heating and cooling)
Yes
Modify timer
settings
No 1-7
1-7
Depending on the model, are the settings invalid?
(Example: Trying to set a cooling-only model to heating
operation)
Yes
Modify timer
settings
No
1-8
1-8 Are settings applied that change directly from cooling (dry) to
heating (or vice versa)?
Yes 1-10
No
1-9
1-9 Is the timer also used for other equipment (remote controller,
Schedule Timer, etc.)?
Yes
Check setting
conflict.
No
1-10
Set a timer for [OFF] or [Fan] for one minute before (for example) switching the cooling /
heating mode.
1. Intelligent Controller
or
communication
adaptor
1-1
Have you definitely set [System Settings] → [Event Control]?
Yes 1-2
No
Modify settings
1-2
Is the connection of Batch stop (startup) input correct?
Intelligent Controller
Communication Adaptor
27P terminal board
20P terminal board
20, 21 (DI1)
16, 17 (DI1)
20, 22 (DI2)
16, 18 (DI2)
20, 23 (DI3)
16, 19 (DI3)
Is there a mistake in the connection, or a disconnection or
open circuit?
Yes
1-3
No
Correct wiring
1-3 When the wiring of the Batch stop (startup) input signal is
removed from the terminal board and the Batch stop (startup)
input part of the terminal board is short-circuited by using an
appropriate wire, or broken piece of lead wire, does the unit
turn OFF (ON) correctly?
Yes
1-4
No
1-5
1-4 Is the Batch stop (startup) input signal input with no voltage
“a” contact or a static signal?
Yes
Go back to 1-2
No
Modify
1-5 On the [Settings] → [System Settings] → [I/D unit settings]
screen,
1
is there no check mark in the [Register] field, or is
it
2
[Not managed]?
Yes
Modify settings
No
1-6
1-6 Replace MAIN board of communication adaptor connecting bulk input signal.
If only an Intelligent Controller is used, replace the Intelligent Controller.
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