Maintenance
44
Troubleshooting Top Oven Section
SEQUENCE OF OPERATION - STEAM
NOTE: Electricity flows through these components
in the order listed.
1. Terminal block L1, L2, L3 (440V/3ph)
2. Primary coil of transformer (T1) (step down
440V to 220V)
3. Secondary coil of transformer (T1), 220V
4. Control circuit breaker (CB1)
5. Plug connector P3 terminal 9
6. Jack connector J3 terminal 9
7. Jack connector J9 terminal 21
8. Cavity high limit (F3) terminal 1 to 2
9. Jack connector J9 terminal 2
10. Mode switch (S1) terminal 3 to 4
11. Power junction: to follow, control circuit operaĆ
tion. Jump to step 37 to go to fill circuit for boiler
12. Power ON light (H4)
13. Electrical compartment cooling fan (CF)
14. Jack connector J9 terminal 5
15. Door switch (S2)
16. Jack connector J9 terminal 13
17. Meat probe relay (R5) terminal 6 to 1
18. Timer (S4) terminals 4 to 6 or Timer (S4) termiĆ
nal 4 to 5, if timer is timed out
19. Buzzer (T1)
20. Jack connector J9 terminal 11
21. Power junction: to follow, motor operation.
Jump to step 32 to continue control circuit opĆ
eration
22. Jack connector P3 terminal 1
23. Plug connector P3 terminal 1
24. Motor contactor (K8) coil terminal A1 to A2
25. Auxiliary contact (K6ĆAUX) on redundant conĆ
tactor (K6)
26. Terminal block L1, L2, L3 (440V/3ph)
27. Redundant contactor (K6) terminals T1, T2, T3
28. Motor contactor (K8) terminals L1, L2, L3
29. Motor overload protector (OL6) terminals T1,
T2,T3
30. Terminal block (TB2Ć1, 2, & 3)
31. Convection motor
32. Mode switch (S1) terminal 7 to 8
33. Jack connector J9 terminal 19
34. Too Hot to Steam thermostat (P1) terminal 31
to 34 (closes at 230F)
35. Jack connector J9 terminal 20
36. Don't steam light (H2)
37. Mode switch (S1) terminal 1 to 2
38. Jack connector J9 terminal 6
39. Jack connector J3 terminal 5
40. Boiler duty cycle control (TMR4) terminal A1 to
A2
41. Mode switch (S1) terminal 5 to 6
42. Jack terminal J9 terminal 24
43. Jack terminal J3 terminal 10
44. Plug connector P3 terminal 10
45. Float debounce timer (TMR3) terminal A1 and C
46. Float (SW2) terminal 1 to 2
47. Float debounce timer (TMR3), if water level
satisfied, Jump to step 43
48. Terminal C to NO if low water
49. Water solenoid (SOL2) terminal 1 to 2
50. Float dedounce timer (TMR3) terminal NC
51. Boiler duty cycle control (TMR4) terminal C to
NO
52. Steam contactor (K3) coil terminal A1 to A2
46) Auxiliary contact (K6ĆAUX) on redundant
contactor (K6)
53. Terminal block L1, L2, L3 (440V/3ph)
54. Redundant contactor (K6) terminals T1, T2, T3
55. Steam contactor (K3) terminals L1, L2, L3
56. Steam overload protector (OL2) terminals T1,
T2, T3
57. Steam elements
