26
TAM7-SF-2E-EN
HHC FAULT LED (RED)
DESCRIPTION
OFF
No Fault
1
Internal communication error
2
Water temp is at 38F or lower
3
Water temp sensor is shorted
4
Water temp sensor is open
5
Configuration error
(a)
6
Heat demand error
(a)
Confirm heater model and dip switch configuration
HHC STATUS LED (GREEN)
DESCRIPTION
1 per second
Standby or idle
2 per second
Heating demand is present
HHC UNIT LED (BLUE)
DESCRIPTION
1 Flash
Normal (1 flash every 4 seconds)
Rapid
Communication Busy Error (2 flashes per second)
SOLID ON
Communications cannot be established with the AFC
Off
No Power
GND
13.8VDC
+5V
.
TRANE U.S . INC.
UNIT
S TATUS
FAULT
13.8V
DATA A
DATA B
GND
P b
D
1
8
D
1
6
D14
D
1
2
D15
D17
R48
R47
R46
R45
R44
MOV1
1
S W1
K1
AUX
P GC
P GD
VS S
VDD
MCLR
.
P 3
C16
1
P 4
X
1
U3
U2
U1
R
3
9
R37
R36
R35
R
3
4
R
3
3
R
3
2
R
3
1
R
3
0
R
2
9
R
2
8
R27
R26
R
2
5
R
2
4
R
2
3
R
2
2
R
2
0
R
1
9
R
1
8
R17
R
1
6
R
1
5
R14
R
1
3
R
1
2
R11
R
1
0
R
9
R
8
R
7
R6
R
5
R
4
R3
R2
R
1
Q1
P 6
P 5
P 1
D13
D11
D
1
0
D
9
D
8
D
7
D6
D5
D4
D3
D2
D1
C13
C12
C
1
1
C9
C8
C
7
C
6
C
5
C4
C3
C
2
C1
C14
R40
R41
C
1
0
C
1
5
C17
R
4
2
R
4
3
F
AULT
S TATUS
UNIT
