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7-15. Misoperation Alarm Indicators
A blinking lamp for other than the signal receiving unit
filter shows that a problem has occurred in the unit so
make an inspection. (Refer to servicing information in
the service manual, etc.) Also, if wired remote control-
ler and dedicated service check lines (854-9-9536-
044-97: service use) are available, then detailed error
information can be obtained by connecting to the
service connector as shown in the drawing. For
information on how to connect to the signal receiving
unit, refer to instruction manual that comes with the
dedicated service check lines.
Table 7-2
Lamp
OPERATION
TIMER
lamp
lamp
O
O
O
O
* S.C. : Serial communications
0 0 0 0 0
WT
Bright
STANDBY
lamp
O
O
O
Alternately Indoor unit protector is activated.
O
Alternately Outdoor unit protector is activated.
O
O
Concurrent Mis-setting of indoor unit.
O
Concurrent Mis-setting of outdoor unit.
Service
connector
Cause of Trouble
No power supply or mis-wiring of signal receiving unit.
S.C.* errors between the indoor unit's controller (PCB) and
signal receiving unit.
S.C. errors between indoor and outdoor units.
Compressor protector is activated.
OPERATION lamp
TIMER lamp
STANDBY lamp
FILTER lamp
61
S4359146
ALL•
RCU : SUB
PCB CHK.
TEST RUN
RCU : MAIN
NORMAL
2013_M_I
Fig. 7-23
2014_M_I
Fig. 7-24
7 7 7 7 7
RC
(WL)
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