Setting Addresses; Setting Of Intermittent Fan Control; Function The Led Of The Indoor Unit Service Board - Mitsubishi Electric CITY MULTI PFFY-W20VCM-A Technical & Service Manual

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[ VII Troubleshooting ]

8. Setting addresses

(Be sure to operate with the main power turned OFF.)
There are two types of rotary switch setting available: setting addresses 1 to 9 and over 10, and setting branch numbers.
1) How to set addresses
Example: If Address is "3", remain SW12 (for over 10) at "0", and match SW11 (for 1 to 9) with "3".
Factory setting
2) How to set branch numbers SW14 (Series R2 only)
The branch number assigned to each indoor unit is the port number of the BC controller to which the indoor unit is con-
nected.
Leave it to "0" on the non-R2 series of units.
Factory setting
The rotary switches are all set to "0" when shipped from the factory. These switches can be used to set unit addresses and
branch numbers at will.
The determination of indoor unit addresses varies with the system at site. Set them referring to the Data Book.

9. Setting of intermittent fan control

When the unit is used in a high temperature and humidity environment, set the function setting No. 119 to "2."
(Default setting: "1")
CAUTION
When the setting is enabled, the stopped fan may start operating.

10.Function the LED of the indoor unit service board

Symbol
Silk display
LED1
Main power source
LED2
Transmission power source
HWE18170
LED operation under normal state
At applying main power source (indoor unit 200V) → Lighting
At receiving M-NET transmission power source
- 20 -
→ Lighting
GB

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