–
66
–
9
-4. Check codes displayed on remote controller and SMMS outdoor unit (7-segment
display on I/F board) and locations to be checked
Check code
Location
of
detection
Description
System status
Error detection
condition(s)
Check items (locations)
Outdoor 7-segment display
Sub-code
E01
Remote
controller
Indoor-remote
controller
communication
error
(detected at
remote
controller end)
Stop of
corresponding
unit
Communication between
indoor P.C. board and remote
controller is disrupted.
Check remote controller
inter-unit tie cable (A / B).
Check for broken wire or
connector bad contact.
Check indoor power
supply.
Check for defect in indoor
P.C. board.
Check remote controller
address settings
(when two remote
controllers are in use).
Check remote controller
P.C. board.
E02
Remote
controller
Remote
controller
transmission
error
Stop of
corresponding
unit
Signal cannot be transmitted
from remote controller to
indoor unit.
Check internal
transmission circuit of
remote controller.
--- Replace remote
controller as necessary.
E03
Indoor
unit
Indoor-remote
controller
communication
error
(detected at
indoor end)
Stop of
corresponding
unit
There is no communication
from remote controller
(including wireless) or
network adaptor.
Check remote controller
and network adaptor
wiring.
E04
Indoor
unit
Indoor-outdoor
communication
circuit error
(detected at
indoor end)
Stop of
corresponding
unit
Indoor unit is not receiving
signal from outdoor unit.
Check order in which
power was turned on for
indoor and outdoor units.
Check indoor address
setting.
Check indoor-outdoor tie
cable.
Check outdoor termination
resistance setting (SW30,
Bit 2).
E06
E06
E07
No. of indoor
units from
which signal is
received
normally
I/F
Dropping out of
indoor unit
All stop
Indoor unit initially
communicating normally fails
to return signal for specified
length of time.
Check power supply to
indoor unit.
(Is power turned on?)
Check connection of
indoor-outdoor
communication cable.
Check connection of
communication connectors
on indoor P.C. board.
Check connection of
communication connectors
on outdoor P.C. board.
Check for defect in indoor
P.C. board.
Check for defect in outdoor
P.C. board (I/F).
I/F
Indoor-outdoor
communication
circuit error
(detected at
outdoor end)
All stop
Signal cannot be transmitted
from outdoor to indoor units
for 30 seconds continuously.
Check outdoor termination
resistance setting (SW30,
Bit 2).
Check connection of
indoor-outdoor
communication circuit.
Check
code
Main
remote
controller
For other types of outdoor units, refer to their own service manuals.
Summary of Contents for MMD-AP0186HP-E
Page 20: ... 20 4 WIRING DIAGRAMS ...
