TAM7-SF-2E-EN
25
EHC STATUS LED (GREEN)
DESCRIPTION
1
1 heater relay energized or stand by
(a)
2
2 heater relays energized
3
3 heater relays energized
4
4 heater relays energized
5
5 heater relays energized
Note:
On a call for heat, STATUS LED will flash per the table above every 4 seconds
On a call for heat, STATUS LED will flash per the table above every 4 seconds
(a)
Standby mode STATUS LED will flash 1 time per second
EHC FAULT LED (RED)
DESCRIPTION
OFF
No fault
1
Internal communication error
2
Heat relay stuck open
3
Heat relay stuck closed
4
Non-cycling limit (NTCO) or element open
5
Cycling limit (CTCO) open
6
Configuration error
(a)
7
Low Airflow
(b)
8
Blower interlock relay stuck open or stuck closed
(a)
Confirm heater model and kw jumper match
(b)
Disregard this error on EHC controls prior to CNT06726 (3 relay) and CNT07015 (5 relay)
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
2
0
K
W
1
5
K
W
1
0
K
W
8
K
W
5
K
W
P
A
R
K
TRANE U.S . INC.
FAULT
S TATUS
UNIT
T8
T7
T6
13
.8
V
D
A
TA
A
D
A
TA
B
G
N
D
+5V
+13.8V
G ND
2
5
K
W
R73
R72
R
7
1
R70
M
O
V
1
D23
D
2
2
R
6
9
R
6
6
J P 1
C13
R
6
5
R
6
4
R63
R62
R
6
1
R
6
0
R19
R18
D8
D7
T11
T9
R
5
6
R
5
5
R
5
4
R53
R
5
2
R
5
1
R50
R49
R48
R47
R46
R45
R44
R
3
7
R36
R
3
0
R
2
9
D20
D
1
9
D
1
7
D
1
6
D
1
5
D
1
4
D12
D11
D10
D9
C11
C
9
P 3
A
U
X
P
G
C
P
G
D
V
S
S
V
D
D
M
C
L
R
1
P 1
X1
U1
T2
T1
R43
R41
R39
R27
R26
R38
R33
R32
R35
R
3
4
R28
R31
D6
D5
D3
D2
D1
C
1
0
C5
C7
C6
C
4
C3
C8
C2
C1
P 2
K6
U3
U2
U4
R5
R10
R15
R20
R25
U5
U6
U7
U8
U9
R40
T5
T4
T3
T10
T12
R14
R13
R9
R8
R7
R6
R4
R3
R2
R1
R17
R16
R12
R11
R23
R22
R
2
1
R24
K1
K2
K3
K4
K5
R57
R58
R59
C12
D4
D21
R67
R68
D24
D25
UNIT
LED
S TATUS
LED
FAULT
LED
