SiE-05C Outline of Control
Functions PLUS Series 247
4.18.2 Emergency Operation 2
Setting forced backup operation by setting mode 2 enables emergency operation with INV outdoor unit and
other STD outdoor unit if STD outdoor unit malfunction.
Operation of faulty STD outdoor unit
In case of cooling only system
Other outdoor units operate by normal operation.
Difference with Backup Operation
Backup operation is conducted for a maximum of 3 hours, but there is no time limit with this mode.
Compressor Outdoor unit fan Outdoor unit EEV Hot gas bypass
Faulty STD outdoor
unit
OFF H + ON 0 PLS ON
Compressor Outdoor unit fan Function unit’s solenoid valveY5, Y6, Y7
Faulty STD outdoor
unit
OFF H + ON ON
SI-05C.BOOK Page 247 Monday, November 6, 2000 4:13 PM
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