Indoor remote
controller
status
Header unit
7-segment
display
serusaemretnuoCesuaC
No response
L08
Line addresses and indoor addresses of all the connected
indoor units are not set.
Set up addresses.
There is no header unit of group control. Set up a group address.
E19
-00
Alternate
blinking
:redro eht nI( .niaga rewop eht no nruT.no denrut ton si rewop tinu roodnI
indoor
outdoor)
Indoor/outdoor communication line is not correctly connected
to the U1/U2 terminal of the header unit ( Fig. 1). (Indoor/
outdoor cannot communicate before address setup.)
Correct wiring
There is no of outdoor terminator resistor, or there
are two or more resistances (before address setup).
Check SW30 bit 2 of the header unit.
No connection between multiple refrigerant
lines: SW30 bit 2 is on.
Connection between multiple refrigerant
lines: SW30 bit 2 of the connected header
unit is turned on only for one line.
E19
-02
Alternate
blinking
When connecting an indoor/outdoor communication line
between outdoor units under the condition of a connected
communication line between outdoor units ( Fig. 2).
Correct wiring
”.ffo“ ot sehctiws 80WS lla nruT
SW08 setup trouble
E20
-01
Alternate
blinking
Address setup is performed with connecting an indoor/
outdoor communication line between outdoor units ( Fig. 3).
Correct wiring
Address setup is performed under the condition of
connecting multiple refrigerant lines ( Fig. 3).
Correct wiring
Indoor remote
controller
status
Header unit
7-segment
display
serusaemretnuoCesuaC
No response None
The communication line is not connected between indoor
and outdoor (the unit that does not respond to the indoor
remote controller).
Improve the wiring.
Line address and indoor address are not set (the unit that
does not respond to the indoor remote controller).
Set up the address.
The power of the header unit of the group is not turned on in
indoor group control (the unit that does not respond to the
indoor remote controller).
Turn on the power.
Group address is set to the follower unit for individual control
(the unit that does not respond to the indoor remote
controller).
Set the group address to “0” in the case of
individual control.
No display on the
indoor remote
controller (no line
is output.)
None
The power is not turned on (the unit that is not displayed on
the indoor remote controller).
Turn on the power.
The indoor remote controller is not connected with a wire (the
unit that is not displayed on the indoor remote controller).
Improve the wiring.
Miswiring of the indoor remote controller (the unit that is not
displayed on the indoor remote controller)
Improve the wiring.
Indoor remote controller communication circuit trouble (the
unit that is not displayed on the indoor remote controller)
If 208/230V is incorrectly applied to the indoor remote
controller terminal, the remote controller communication
circuit fails.
Remove the quick connect terminal
connected to indoor remote controller
terminals A/B, and check the voltage. If
voltage is not applied (normally 15 to 18 V),
replace the PC board.
ON
12
SW30
8-5-2. Operation from the indoor remote controller is not accepted,
and a check code is displayed on the 7-segment display of the
interface PC board of the header unit.
8-5-3. There is no display of a check code on the 7-segment display
on the interface PC board of the header unit, although there
is indoor unit that is not accepting operation from the indoor
remote controller.
− 105 −
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