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 Outdoor Unit; There Is No Display Of A Check Code On The 7-Segment Display On The Interface; Operation From The Indoor Remote Controller - Toshiba MMY-SAP0806HT8P-E Service Manual

7-5-2. 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 outdoor unit.
Outdoor unit
Indoor remote
controller 7-segment
status display
L08
E19 -00
Alternate
blinking
No response
E20 -01
Alternate
blinking
7-5-3. There is no display of a check code on the 7-segment display
on the interface PC board of the outdoor unit, although there
is indoor unit that is not accepting operation from the indoor
remote controller.
Outdoor unit
Indoor remote
controller 7-segment
status display
No response None
No display on the
indoor remote
None
controller (no line
is output.)
C a u s
Line addresses and indoor addresses of all the connected
indoor units are not set.
There is no header unit of group control.
n I d o r o u n t i p o w r e s i n t o u t n r e d o
Indoor/outdoor communication line is not correctly connected
to the U1/U2 terminal of the outdoor unit ( Fig. 1). (Indoor/
outdoor cannot communicate before address setup.)
There is no of outdoor terminator resistor , or there
are two or more resistances (before address setup).
Address setup is performed under the condition of
connecting multiple refrigerant lines ( Fig. 2).
C a u s
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).
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
displayed on the indoor remote controller)
Indoor remote controller communication circuit trouble (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.
e
Set up addresses.
Set up a group address.
. n T u
indoor
Correct wiring
Check SW30 bit 2 of the outdoor unit.
ON
No connection between multiple refrigerant
1 2
lines: SW30 bit 2 is on.
Connection between multiple refrigerant
SW30
lines: SW30 bit 2 of the connected outdoor
unit is turned on only for one line.
Correct wiring
e
Improve 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.
Improve the wiring.
Improve the wiring.
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.
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C o u t n r e m e a s u e r s
n r o n h t e p o w r e a g a n i ( . n I h t e o d r
outdoor)
C o u t n r e m e a s u e r s
e : r