Toshiba MMY-MAP0806FT8P-TR Service Manual page 247

Outdoor Unit (16, 18, 20HP)
Model: MMY-MAP1606FT*, MAP1806FT*, MAP2006FT*
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)
CN22
CN21
CN23
CN22
CN21
CN23
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CN23
CN23