Hhc Fault Codes (Red Led); Hhc Status Codes (Green Led); Hhc Unit Led (Blue Led) - Trane 7 Series Field Reference Data

HHC FAULT CODES (RED LED)

HHC
Fault LED
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
Configuration error
5
6 Heat demand error
NOTES:
1) Confirm heater model and dip switch configuration

HHC STATUS CODES (GREEN LED)

HHC STATUS LED
1 per second
2 per second

HHC UNIT LED (BLUE LED)

Unit LED
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
Description
(1)
Description
Standby or idle (see note)
Heating demand is present
Description
D11
U3
C1
. R41
P1
R40
13.8V
C4
DATA A
R45 R44
DATA B
GND
C3
MOV1
13.8VDC
C13
U1
R37
R27
U2
D13
R26
K1
R48
R47
R46
Q1
C8
P4 R14
1
GND
C9
R11
P3
TRANE U.S. INC.
C14
Pb
TAM7­23
FAULT
+5V
D6
STATUS
D3
FAULT
D5
D2
STATUS
UNIT
D4
R17
D1
R6
UNIT
D17
D15
D14
SW1
1
C17
P6
MCLR
R35
VDD
VSS
C12
PGD C16
PGC
R36
AUX
R2
P5
R3