MULTI TYPE

Check code Check code name
Cause
[E18] / [97•99]
(AI-NET)
Communication error between
indoor header and follower
Regular communication between indoor header and
follower is unavailable.
Are remote
controller inter-unit wires
(A/B) normal?
No
Correct remote controller
inter-unit wire.
Yes
Is there any
disconnection of
connector or wiring from
terminal block of
indoor unit?
Yes
Correct connection of
connector.
Check circuit wire.
No
Is group
control operation
executed?
No
Yes
Are powers of all indoor
units turned on?
No
Check power connection
status of indoor unit. (Turn
on the power again.)
Yes
Check indoor address.
Check indoor P.C. board.
Failure ➝ Replace
Correct indoor address.
Check code Check code name
Cause
[E16] / [89]
(AI-NET)
Number/capacity of connected
indoor units beyond the limit
1. There are 48 or more connected indoor units.
2. Capacity over of total connected indoor units.
3. Incorrect setup of indoor units' power
Sub-code: 00 : Capacity over, 01-: number of connected units
Is backup
operation of outdoor unit
being set up?
No
Yes
Indoor capacity over has been
detected during the backup
operation.
Perform setup of no detection for
capacity over. (*1)
Is No. of connected
indoor units correct?
No
Excessive indoor units are
connected.
Correct miswiring.
Yes
Is setup of indoor
units' HP correct?
No
Correct HP setup.
Yes
Is total capacity
of connected indoor
units within 135%?
No
Set capacity of connected indoor
units within 135% of outdoor units.
Yes
For a service
P.C. board, check
outdoor HP setup.
(Set up jumper 9, 10, 11,
and 12.)
OK
Set up outdoor HP.
(Refer “13 P.C. BOARD
EXCHANGE PROCEDURES”.)
NG
Check outdoor interface
P.C. board.
(*1) To deactivate the capacity-over detection
Turn SW09 Bit 2 on I/F P.C. board of header outdoor unit to ON.
(Usually OFF)
198