AccuTemp Accu-Steam G2 Series, Service Manual

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Accu-Steam™ G2 Gas Service Manual
13
SP8042-1911
H
Heat light
not on • If griddle is warming up or regulating at a set point, replace indicator
lamp.
• If griddle is not warming up or regulating at a set point, check to see if
temp demand control relay (24VDC) relay is engaged.
• If control relay is not engaged, check for 24VDC at terminals 7 & 8 from
temperature controller.
• If voltage is at relay coil, replace relay.
• If voltage is not at relay coil, replace temperature controller.
• 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.
I
Unit not
heating up • 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.
J
Inaccurate
Temperature • 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.
SCHEMATIC,
G2 GRIDDLE
Fort Wayne, IN 46825
AT2T-3912
-1 Rev A
8415 N. Clinton Park
AccuTemp Products, Inc.
AT2T-3912-1
120V-240V
ACCU-STEAM G2 GAS
GRIDDLE
YEL
ORN
BRN
VIO
BRN
YEL
BLU
YEL
BLU
RED
ORN
YEL
100 O
PRTD
1000O
PRTD
N.O.
N.C.
COM
7
4
1
N.O.
N.C.
COM
8
5
2
3
6
RLY 2
DC COIL
BRN
WHT/GRAY
GRY
WHT/BRN
WHT/BRN
OVER
TEMP
VIO
L1 L2 N.C. N.O. COM *RTD* RESET
HIGH LIMIT
CONTROLLER
YEL
BRN
ZR1
38V
ZR2
38V
PV
MV
GAS VALVE
1
2
3
4
5
6
SPARK
MODULE
GRN
HV IGNITOR
BURNER
BLK
WHT
GRN
2
1
WHT BLK
RED
YEL
BLU
HEAT
RED RED
BLK
WHT
240V
208V
120V
COM
24V
RED
ORN
.75 A
F2
.75 A
F1
IGN FAULT
BLU
WHT
FAULT
TIMER
1
2
3
1 2
J2
POWER
INPUT
DIGITAL
CONTROLLER
ON/
OFF
1 2 3 4 5 6
J7
+24V
GND
1 2
J3
SENSOR
INPUT
1 2 3 4 5
ISSP
YEL
VIO
GRN
1
2
J1
3
4
OPTIONAL
REMOTE
TIMER
AT0A-2779-5
TRANSFORMER ASSEMBLY
AT0E-3625-5
Control Board
AT0E-3880-1
HI-LIMIT CONTROL
AT0E-2825-6
Relay, DC
AT0E-1800-2
PILOT LAMP, RED
AT2E-1807-1
IGNITION CONTOL MODULE
AT2E-4717-1
FLAME SENSE PROBE
AT2E-4716-1
IGNITOR
AT2E-1806-2
NG CONTROL VALVE
AT2E-1806-3
PROPANE CONTROL VALVE
AT0E-2885-7
HI-LIMIT SENSOR
AT0E-2885-8
TEMPERATURE SENSOR
AT0A-2911-1
AC POWER CORD ASSEMBLY
AT0E-2500-3
TIME DELAY RELAY
AT2B-2099-2
36"& 48"
BURNER
AT2B-2131-2
24"
BURNER
Fig 4.D