Frymaster 47 Series Service & Parts Manual page 9

IFB 806-5857: The electronic ignition board contains two types of relays. Heat relays (K1 and K3)
operate at 12 VDC output from the controller. They switch 24 VAC to the main gas circuit when the
unit calls for heat. The middle relay (K2) switches 24 VAC to the pilot circuit when the unit is
powered up. The purpose of this relay is to allow the pilot to remain continuously lit.
J1
4
3
2
1
FREQUENTLY USED TEST POINTS FOR INTERFACE BOARD P/N
Test
12VAC Power to Controller
24VAC Power to Right Module
24VAC Power to Left Module
12VDC Power to Right MBL Relay
12VDC Power to Left MBL Relay
24VAC Power to Right High-Limit
24VAC Power to Left High-Limit
Probe Resistance (Right)*
Probe Resistance (Left)*
High-Limit Continuity (Right)
High-Limit Continuity (Left)
* Disconnect 15-pin harness from controller before testing probe circuit.
** See Probe Resistance Charts in this chapter.
47 SERIES GAS FRYERS
CHAPTER 1: SERVICE PROCEDURES
SOUND MV
AL PV
1
1 2
2
3
15
14
13 15
K1
HEAT
RELAY
PWR
GND
V1
AL
12 9 6 3
J2
11 8 5 2
10 7 4 1
INTERFACE BOARD
Meter
Setting
50VAC Scale
50VAC Scale
50VAC Scale
50VDC Scale
50VDC Scale
50VAC Scale
50VAC Scale
R x 1000 Ohms
R x 1000 Ohms
R x 1 Ohm
R x 1 Ohm
CMP PWR 24V MV
PV
6 3 4
12 9 6 3
J3
11 8 5 2
10 7 4 1
K2
K3
STANDING
HEAT
PILOT
RELAY
RELAY
12 9 6 3
11 8 5 2
10 7 4 1
806-5857
Pins
1 and 3 on J3
4 on J5 and GROUND
4 on J1 and GROUND
7 on J3 and 9 on J4
9 on J3 and 6 on J2
12 on J4 and GROUND
3 on J2 and GROUND
14 on J3 and 10 on J4
14 on J3 and 1 on J2
12 on J4 and Wire 13C on Gas Valve
3 on J2 and Wire 12C on Gas Valve
1-4
AL
5
J5
1
AL
2
V1
3
GND
4
PWR
J4
806-5857
Test
Results
12-18
22-28
22-28
12-18
12-18
22-28
22-28
**
**
0
0