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YES
YES
YES
YES
NO
NO
NO
NO
OK
NG
Is backup operation of outdoor unit being set up?
Is No. of connected indoor units correct?
Is setup of indoor unit HP correct?
Is total capacity of connected
indoor units within 135%? (
1)
For a service P.C. board, check outdoor HP setup.
(Set up jumper 9, 10, 11, and 12.)
Set up outdoor HP.
(Refer “How to exchange interface P.C. board”.)
Set capacity of connected
indoor units within 135% of outdoor units.
Correct HP setup.
Excessive indoor units are connected.
Correct miswiring.
Perform setup of no detection
for capacity over.
Check outdoor interface P.C. board A’ssy.
Check code
[E16]
Check code name
Connected indoor units
capacity over
Cause of operation
1. There are 48 or more connected indoor units.
2. Capacity over of total connected indoor units.
3. Incorrect setup of indoor/outdoor capacity
Auxiliary code : 00 : Capacity over 01 : ~ : Number of connected indoor units
(
∗∗
∗∗
∗1) When capacity of the outdoor unit is 12HP,
up to the maximum capacity 120% of
indoor units can be connected.
YES
YES
YES
YES
NO
NO
NO
NO
Is a group control operation?
Check indoor address.
Correct indoor address.
Is there any disconnection of
connector or wiring from terminal block
of indoor unit?
Are remote controller
inter-unit wires (A/B) normal?
Are powers of
all indoor units turned on?
Check indoor P.C. board.
Failure
Replace
Check power connection status
of indoor unit.
Correct connection of connector.
Check circuit wire.
Correct remote controller
inter-unit wire.
Check code
[E18]
Check code name
Communication error between
indoor header and follower
Cause of operation
Regular communication between indoor header
and follower is unavailable.
YES
YES
NO
NO
Are not communication lines (U1, U2)
between indoor and outdoor connected
to multiple outdoor units?
Is communication line between indoor and
outdoor connected to one unit per 1 system?
Check I/F board.
Connect communication line between indoor
and outdoor.
Connect communication line between indoor
and outdoor to one unit per 1 system.
Check code
[E19]
Check code name
Header outdoor units quantity error
Cause of operation
1. Misconnection of inter-unit cable between
indoor and outdoor
2. Outdoor I/F P.C. board error
Auxiliary code : 00: No header unit 02: Two or more header units
Reference)
When the power supply of the outdoor unit is firstly
turned on, the check code [E19 00] is displayed until the
power supplies of the indoor units are turned on. However
it is not an error. If the power supplies of the indoor units
are turned on, the check code is automatically reset.