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 H; There Is No Display Of A Check Code On The 7-Segment Display On The Interface Pc Board Of; Remote Controller - Toshiba MMY-MAP0804HT8-E Service Manual

7-5-2. Operation from the indoor remote controller is not
Indoor remote
controller
status
No response
7-5-3. There is no display of a check code on the 7-segment
Indoor remote
controller
status
No response
No display on the
indoor remote
controller (no line
is output.)
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accepted, and a check code is displayed on the 7-segment
display of the interface PC board of the header unit.
Header unit
7-segment
display
Line addresses and indoor addresses of all the connected
indoor units are not set.
L08
There is no header unit of group control.
Indoor unit power is not turned on.
Indoor/outdoor communication line is not correctly connected
to the U1/U2 terminal of the header unit ( Fig. 1). (Indoor/
E19 œ -00
outdoor cannot communicate before address setup.)
Alternate
There is no of outdoor terminal resistance, or there
blinking
are two or more resistances (before address setup).
When connecting an indoor/outdoor communication line
E19 œ -02
between outdoor units under the condition of a connected
Alternate
communication line between outdoor units ( Fig. 2).
blinking
SW08 setup error
Address setup is performed with connecting an indoor/
E20 œ -01
outdoor communication line between outdoor units ( Fig. 3).
Alternate
Address setup is performed under the condition of
blinking
connecting multiple refrigerant lines ( Fig. 3).
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.
Header unit
7-segment
display
The communication line is not connected between indoor
and outdoor (the unit that does not respond to the indoor

remote controller).

Line address and indoor address are not set (the unit that
does not respond to the indoor remote controller).
None
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).
Group address is set to the follower unit for individual control
(the unit that does not respond to the indoor remote
controller).
The power is not turned on (the unit that is not displayed on
the indoor remote controller).
The indoor remote controller is not connected with a wire (the
unit that is not displayed on the indoor remote controller).
Miswiring of the indoor remote controller (the unit that is not
None
displayed on the indoor remote controller)
Indoor remote controller communication circuit error (the unit
that is not displayed on the indoor remote controller)
If 220-240 V is incorrectly applied to the indoor remote
controller terminal, the remote controller communication
circuit fails.
manuals search engine
Cause
ON
1 2
SW30
Cause
140
Countermeasures
Set up addresses.
Set up a group address.
Turn on the power again. (In the order:
indoor ¨ outdoor)
Correct wiring
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.
Correct wiring
Turn all SW08 switches to "off."
Correct wiring
Correct wiring
Countermeasures
Modify the wiring.
Set up the address.
Turn on the power.
Set the group address to "0" in the case of
individual control.
Turn on the power.
Modify the wiring.
Modify the wiring.
Remove the fast-on 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.