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UH68ODK Tent Heater
4-2
1
2
J6
CONN-H2
ZCC
1
2
3
6
5
4
U5
MOC3031
R10
180
M2M1
G
U8
1
2
J5
CONN-H2
1
2
J3
CONN-H2
1
2
J4
CONN-H2
R15
180
R1
20K
R4
500K
VENT FAN
CARB HTR
IGNITION
COMB BLR
VI
1
VO
3
GND
2
U1
L4805
MOUSER # 511-L4805CV
R16
5.0
C6
0.1uF
C4
100uF
D6
TVS-18V
V+
1
GP5/OSC1/CLK
2
GP4/OSC2/AN3
3
GP3/MCLR
4
GND
8
GP0/AN0
7
GP1/AN1/Vref
6
GP2/T0CLK/AN2/I
5
U3
PIC12C67X
nc
8
nc
7
nc
6
nc
5
nc
1
V+
2
V-
3
nc
4
U2
TMP17
S1
FLAME SWITCH
N.O. 125F (i.e. it closes at 125F)
D11
LED
R18
5.6K
R20
150
D8
1N4001
D7
1N4001
SW1
SW-SP-ON-OFF-ON
C7
0.1uF
R8
38
C8
0.01uF
R9
1K
R2
500K
D4
TVS
C1
330uF 63WV
C5
100uF
D5
4.7V
C3
22uF
D9
LED
R19
150
D10
LED
R22
150
ZCC
1
2
3
6
5
4
U4
MOC3031
R11
180
M2M1
G
U7
R14
180
R6
38
C9
0.01uF
R7
1K
ZCC
1
2
3
6
5
4
U6
MOC3031
R12
180
M2M1
G
U9
R13
180
R3
38
C10
0.01uF
R5
1K
J9
Cir.Brk2
J8
Cir.Brk1
D3
MOV
D1
MOV
D2
MOV
1
2
3
4
5
6
J12
CONN-H6
1
2
3
4
5
6
J10
CONN-H6
D12
LED
R21
150
1
48
5
6
7
TR1
24 V @ 1.5A
1
2
J11
CONN-H2
1
2
J15
CONN-H2
1
4 8
5
6
7
TR2
8V @ 300mA
+-
AC2AC1
BR2
BRIDGE
1.5 A 100V
+-
AC2 AC1
BR1
BRIDGE
4 A 600V
1
2
J1
FUEL PUMP
1
2
J2
FUEL SOL.
1
2
3
J7
CONN-H3
1
2
J14
OVERHEAT SW
1
2
3
4
J13
CONN-H4
D13
1N4004
R17
10K
R23
10K
C11
0.1uF
C12
0.1uF
C2
22uF
Note on Blink Codes
Only the ignition fault will stop heater operation. The other flash codes will be displayed
but the heater will continue to operate.
Troubleshooting Procedures
Electrical Schematic