Tranquility
®
D i g i t a l ( D X M 2 ) — Tr o u b l e s h o o t i n g G u i d e
R e v. : 1 0 M a r c h , 2 0 1 5
36
G e o t h e r m a l H e a t i n g a n d C o o l i n g
A0-2 Jumper
A-V
Checking for Power at DXM2
A-W
P1
Alarm Relay
Comp Relay
O
Y1
Y2
W
G
C
R
AL1
24Vdc
EH1 EH2
P6
R
C
Off On
JW3
A
OV
R
ESD
C
R
NSB
AL2
JW1
Acc1 Relay
Acc2 Relay
H
CO
M
NC1
NO
1
CO
M
NC2
NO
2
P3
CO
RV
RV
LT1 LT1 LT2 LT2
LP LP
HP
HP
P7
Status
Fault
R
R
CC
CCG
CO
S1
S2
1
12
1
4
Factory Use
(240V
ac)
Com
N.O.
Fan Enable
5
1/
2"
7"
6
1/
2"
5"
Use 4 mounting screws
#6 sheet metal screw 1” long
1.5
3/8” standof
f
Factory lo
w
voltage mole
x
connection for unit harness
Factory lo
w
voltage mole
x
connection for electric heat
harness
Micr
o
U1
Off On
P2
COH
COM
AO2
P11
Gnd
T1
P10
T2
T2
T3
T3
T4
T4
T5
P9
T5
T6
T6
A0-1
A0-2
Off On
S3
RV Relay
CCH Relay
Test
P5
B-
Gnd
P4
A+
24V
(240V
ac)
Fan Speed
N.O.
N.C.
12V
OUT Gnd
P8
IN
NC
P12
Note: There is only one T1 connection
1 2 3 4
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
AO1
Gnd
1) 18-31.5V A/C. Verify
proper voltage to
the board.
2) If there is no 24V at DXM2, verify that the
breaker is not tripped on the transformer.
Ensure that the power supply to your transformer
is using correct Tap (208/230).
Note: On Splits, 24V transformer is in the Air Handler
connected to the AXM board then connected to DXM2.
Blue
Yellow
Red
208
Orange
230
Black
Common
P1
Alarm Relay
Comp Relay
O
Y1
Y2
W
G
C
R
AL1
24Vdc
EH1 EH2
P6
R
C
Off On
JW3
A
OV
R
ESD
C
R
NSB
AL2
JW1
Acc1 Relay
Acc2 Relay
H
CO
M
NC1
NO
1
CO
M
NC2
NO
2
P3
CO
RV
RV
LT1 LT1 LT2 LT2
LP LP
HP
HP
P7
Status
Fault
R
R
CC
CCG
CO
S1
S2
1
12
1
4
Factory Use
(240V
ac)
Com
N.O.
Fan Enable
5
1/
2"
7"
6
1/
2"
5"
Use 4 mounting screws
#6 sheet metal screw 1” long
1.5
3/8” standof
f
Factory lo
w
voltage mole
x
connection for unit harness
Factory lo
w
voltage mole
x
connection for electric heat
harness
Micr
o
U1
Off On
P2
COH
COM
AO2
P11
Gnd
T1
P10
T2
T2
T3
T3
T4
T4
T5
P9
T5
T6
T6
A0-1
A0-2
Off On
S3
RV Relay
CCH Relay
Test
P5
B-
Gnd
P4
A+
24V
(240V
ac)
Fan Speed
N.O.
N.C.
12V
OUT Gnd
P8
IN
NC
P12
Note: There is only one T1 connection
1 2 3 4
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
AO1
Gnd
For Mod Valve
For Pump
A0-2 Jumper
Location
IOV
PWM
IOV
PWM
