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Case 3.a
(Auto address setting in heating mode)
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In case of impossibility of turning ON power to indoor/outdoor units in each refrigerant system:
Indoor unit auto address setting cannot be made unless the compressor is started.
How to control automatic address from outdoor unit
1. Make all settings following the same procedure described under steps 1 to 4 in
Case 2 .
5. Turn ON power to all indoor and outdoor units in all refrigerant systems.
6. If you wish to make auto address setting in
heating mode
, short circuit the A.ADD pin (CN30) on outdoor main unit control
P.C. board for the desired auto address setting in a refrigerant system for over 1 second long and then open circuit.
(Be sure to make settings in each refrigerant system. It is impossible to perform auto address setting in a multiple refrigerant
system simultaneously.)
(Communication for auto address setting begins and the compressor is started and auto address setting in heating mode
begins.)
(All indoor units can also be operated.)
* To cancel, again short circuit the A.ADD pin (CN30) for over 1 second long and then open circuit.
LEDs 1 and 2 that indicate auto address setting is in progress go out and that process is stopped.
Be sure to perform auto address setting again.
(Auto address setting is completed when the compressor stops and LEDs 1 and 2 on outdoor main unit control P.C. board go
out.)
7. Short circuit the A.ADD pin (CN30) on outdoor main unit in another refrigerant system for over 1 second long and then open
circuit.
(Repeat the same procedure and complete auto address setting.)
8. Remote control operation is now available.
* When installing auto address setting by the remote controller, control auto address setting by the remote controller after step 5.
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Refer to section “Auto Address Setting by Remote Controller.”
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