(6) Turn on the power supply to all the units connected to the system other than the failed follower unit.
Determine what to do with the power supply to the failed follower unit in the following manner.
<In case of failure in compressor, electrical part, P.C. board>
Leave the power supply off.
<In case of failure in refrigerating circuit or related part (pressure sensor, temperature sensor, refrigerating
cycle part, or fan system part)>
Turn on the power supply to protect the compressor (by turning on the case heater).
(When the power supply to the unit is turned on, [E19] (failure in the number of outdoor header units) will be
displayed on the 7-segment display. However, this will not cause any problems.)
(7) Perform settings needed to gain permission for backup operation from the header unit (failure clearance).
1) Set SW01/02/03 on the interface P.C. board to 1/1/1 and confirm that [U1] [E26] (dropping out of an
outdoor unit) is displayed on the 7-segment display.
2) Set SW01/02/03 on the interface P.C. board to 2/16/1. Upon confirming that [Er] [… … …] is displayed on
the 7-segment display, press SW04 and hold for 5 seconds or more.
3) [Er] [… CL] (failure clearance completed) will be displayed on the 7-segment display.
4) Set SW01/02/03 back to 1/1/1. (The display should change to [U1] [– – –].)
This is the end of follower outdoor unit backup operation setting. Check the operation.
Interface P.C. board of header unit
(7)
Set SW01/02/03 to 1/1/1
[U1] [E26] will be displayed.
Set SW01/02/03 to [2/16/1].
[Er] [… … …] will be displayed.
Press SW04 and hold for 5 seconds or more
[Er] [… CL] will be displayed.
Set SW01/02/03 back to 1/1/1.
[U1] [– – –] will be displayed.
SW04
SW01
Rotary switches
7-segment
display [B]
Push switch
7-segment
display [A]
SW02
SW03
SW05
SW06
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Содержание MMY-MUP0801HT7JP
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