AccuTemp ACCU-STEAM G2 Series Service Manual page 14

Heat light
not on
H
Unit not
heating up
I
Inaccurate
Temperature
J
AT0E-2885-7
HI-LIMIT SENSOR
WHT/GRAY
WHT/BRN
VIO
BRN
1 2 1
RESET
J2
POWER
INPUT
+24V
SP8042-1911
AT2E-4717-1
• If griddle is warming up or regulating at a set point, replace indicator
FLAME SENSE PROBE
lamp.
• AT2B-2099-2 If griddle is not warming up or regulating at a set point, check to see if
36"& 48"
temp demand control relay (24VDC) relay is engaged.
BURNER
• If control relay is not engaged, check for 24VDC at terminals 7 & 8 from
temperature controller.
AT2B-2131-2
• If voltage is at relay coil, replace relay.
24"
• If voltage is not at relay coil, replace temperature controller.
BURNER
• If ice cube relay is engaged, check for poor connections or broken wires.
Blue wires coming from ignition module or brown wire coming from OT
thermostat.
• If connections are good, replace relay.
• Check for 24 VAC to the gas valve.
• If no voltage to the main gas valve check for poor or loose connections
or broken red wire between the "heat" lamp and the gas valve.
• If there is voltage to the red wire of the main gas valve, check for voltage
at the brown wire of the gas valve.
• If there is 24VAC to the brown wire at the pilot gas valve and the pilot
valve has not turned on, replace the gas valve.
• If there is 24VAC to the brown wire at the pilot gas valve and the valve has
turned on, check for proper gas supply and pressures.
• If there is no 24VAC on the brown wire at the pilot gas valve, check for
poor or loose connections or broken brown wire at the gas valve, the
"OT" indicator lamp and the OT thermostat and the demand relay. Repair
as necessary.
• If display temperature is greater than 50 degrees different than
measurement device, verify measurement device. If measurement device
appears to be accurate, measure RTD.
• If RTD measures normally, replace temperature controller.
• If RTD measures out of specifications (temp/resistance), replace RTD.
TEMPERATURE SENSOR
GRY
ORN
2 3 4 5 6
J7
GND
ON/
OFF
CONTROLLER
AT0E-3625-5
Control Board
Accu-Steam™ G2 Gas Service Manual
BURNER
YEL
Fig 4.D
AT0E-2885-8
1000O
PRTD
1 2 1 2 3 4 5
J3 ISSP
SENSOR
INPUT
DIGITAL
ZR2
PV
38V
AT2E-4716-1
HV IGNITOR
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
5
1
N.C.
N.O.
AT0E-2825-6
4
Relay, DC
6
COM
2
RLY 2
N.C.
DC COIL
SCHEMATIC,
IGNITOR
AccuTemp Products, Inc.
8415 N. Clinton Park
Fort Wayne, IN 46825
13