Toshiba SMMS-e Quick Reference page 82

Backup Operation
82
Outdoor Unit (18, 20, 22HP)
Model: MMY-MAP 1806 , MAP2006 , MAP2206
1.When compressor No.1 (front left) is faulty：
Change the connection of wiring between Comp-IPDU and Fan-IPDU as shown in the below.
Change the connection of wiring which is connected to the CN21, 23 of Comp-IPDU1
・Change to CN22 of Comp-IPDU2 from CN21 of Comp-IPDU1
・Change to CN23 of Comp-IPDU2 from CN23 of Comp-IPDU1
(Tighten two wirings together with screw terminal)
2.When compressor No.2 (front right) is faulty：
Change the connection of wiring between Comp-IPDU and Fan-IPDU as shown in the below.
Change the connection of wiring which is connected to the CN21, 23 of Comp-IPDU2
・Change to CN22 of Comp-IPDU1 from CN21 of Comp-IPDU2
・Change to CN23 of Comp-IPDU1 from CN23 of Comp-IPDU2
(Tighten two wirings together with screw terminal)
(4) Turn on the power supply to all the units connected to the system.
This is the end of compressor backup operation setting.
CN22
CN21
CN23 CN23
CN22
CN21
CN23 CN23