Carrier MMY-MAP0724FT9UL Service Manual page 106

Miswiring example
Remote Header unit
Figure controller 7-segment
status display
No
Fig. 1 E19-00
response
No
Fig. 2 E19-02
response
No
Fig. 3 E20-01
response
Figure Status
The number of connected
outdoor units is too few.
Fig. 4
The number of connected
indoor units is too few.
Fig. 5
Header unit Header unit
U3 U4
U1 U2 U1 U2
Header unit Follower unit
U1 U2 U5 U6 U1 U2 U5 U6
U1 U2 U1 U2
Header unit Follower unit
U1 U2 U1 U2
U1 U2 U1 U2
Header unit Follower unit
U1 U2 U3 U4
U1 U2 U1 U2
Header unit
U1 U2
A B
U1 U2
– 106 –
Miswiring example
U5 U6
U1 U2 U1 U2
Header unit Follower unit
U1 U2 U5 U6
U1 U2 U1 U2
Miswiring example
Header unit Follower unit
U1 U2 U3 U4
U1 U2
or
U3 U4
or
U1 U2 U1 U2
U5 U6
Follower unit
U1 U2
Wiring forgotten
U1 U2 U1 U2
Header unit Follower unit
[Line 1] [Line 2]
U1 U2 U1 U2
U1 U2 U1 U2
Header unit Follower unit
U1 U2 U5 U6
U1 U2
or
U3 U4
U1 U2 U1 U2