Mitsubishi Electric PAA-A18AA1 Manuel D'installation page 79

Terminal block pins (out)
A
01 02 03 04 05 06 07 08 09 10 11 12 01 02 03 04 05 06 07 08 09 10 11 12
B
Pin Signal
1B MA communication bus M1. Wire
color: blue
2B MA communication bus M2. Wire
color: white
3 A/B Unused
4 A/B Unused
5A Signal C to furnace (24VAC return).
Wire color: light blue, cyan or black
6A Signal C to furnace (24VAC return).
Wire color: light blue, cyan or black
7A Signal R to furnace (24VAC hot).
Wire color: red
8A Signal R to furnace (24VAC hot).
Wire color: red
9A Signal Y/Y2 to signal Y (wire color:
yellow) of furnace on 1‑speed fan
or to signal Y2 (wire color: blue) of
furnace on 2‑speed fan.
10A Signal W1 to furnace (first stage of
heating). Wire color: white
11A Signal W2 to furnace (second stage
of heating). Wire color: brown
12A Signal G/Y1 to signal G (wire
color: green) of furnace on 1‑speed
furnace or to signal G and Y1 (wire
color: yellow) on 2‑speed furnace.
Specifications are subject to change without notice.
PAA-A18, 24, 30, 36, 42AA1/BA1/CA1
To Furnace
13 14 15 16 17 18 19 20 21 22 23 24 13 14 15 16 17 18 19 20 21 22 23 24
TB-A
To MA
Controller
Circuit Boards
FRONT OF CONTROL BOX
Factory Connec�on Within Control Box. DO NOT ALTER Factory Connec�on Within Control Box. DO NOT ALTER
79
To TH01
S1 S1
TB-B
TB-C
Pin Signal
13A Unused
14A Signal R to non-adjustable
thermostat (NAT) (24 VAC hot) Wire
color: red
15A Unused
16A Unused
17A Signal W2 to optional connection to
NAT (may be connected to W1 to
turn on both stages of furnace when
requested by the NAT) (second
stage of heating). Wire color: brown
18A Signal W1 to NAT (first stage of
heating). Wire color: white
19A Unused
20 Unused
A/B
21 Unused
A/B
22 Unused
A/B
23A RTN (return air temperature
sensor). Wire color: white
24A TH01 return air temperature
sensor). Wire color: black
A
S2 S2 S3 S3
To
Outdoor
Unit
B
© 2022 Mitsubishi Electric US, Inc.