AccuTemp ACCU-STEAM G2 Series Service Manual page 13

Fault light
flashing
F
Fault light on •
G
YEL
VIO
WHT/BRN
BRN
L1 L2 N.C. N.O. COM *RTD*
BRN
RED BRN
OVER
TEMP
AT0E-3880-1
SP8042-1911
HI-LIMIT CONTROL
• If burners did not ignite, check gas pressure, cycle power.
• If burners ignite briefly and then fault light is displayed, cycle power and
verify flame sense. See section 8.3.1 Flame Sense for more information.
• If burners did ignite and unit is heating, check for poor connections in the
harness at the fault timer relay (Fig 4.C).
• Ensure that chassis ground connection is tight.
If burners did not ignite, replace fault timer.
• If burners did ignite and unit heating, check for short to ground in the white
wire connected to the fault indicator lamp.
AT2B-2099-2
AT2B-2131-2
AT0E-2885-7
HI-LIMIT SENSOR
100 O
PRTD
WHT/GRAY
WHT/BRN
ORN
VIO
BRN
1 2 1
RESET
J2
POWER
INPUT
HIGH LIMIT
+24V
CONTROLLER
GND
Accu-Steam™ G2 Gas Service Manual
AT2E-1806-3
PROPANE CONTROL VALVE
RED
BWN
AT2E-4717-1
FLAME SENSE PROBE
36"& 48"
BURNER BURNER
24"
BURNER
Fig 4.C
AT0E-2885-8
TEMPERATURE SENSOR
1000O
PRTD
GRY
2 3 4 5 6 1 2 1 2 3
J7 J3 ISSP
SENSOR
INPUT
ON/ DIGITAL
OFF
CONTROLLER
AT0E-3625-5
Control Board
AT2E-1806-2
NG CONTROL VALVE
YEL
ZR1
MV
38V
GAS VALVE
ZR2
PV
38V
AT2E-4716-1
HV IGNITOR
IGNITOR
YEL
SPARK
MODULE
6
ORN
5
GRN 4
3
BLU
2
RED
1
AT2E-1807-1
IGNITION CONTOL MODULE
8 7
N.O.
BLU
COM
3
4 5 5
1
N.C.
N.O.
AT0E-2825-6
4
Relay, DC
6
COM
2
RLY 2
N.C.
DC COIL
AccuTemp Products, Inc.
8415 N. Clinton Park
Fort Wayne, IN 46825
MAIN VALVE
PILOT VALVE
12