Primus D55, Service Manual, Page: 3 / 82

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Table of Contents
Section 1 – Safety Information
Locating An Authorized Service Person .................4
Section 2 – Introduction
Model Identification ................................................5
Customer Service ....................................................6
Serial Plate Location ...............................................6
Safety Warnings and Decals ...................................7
Safety Precautions for Servicing Tumblers ............7
Section 3 – Troubleshooting
1. Motor Does Not Start .......................................9
2. Motor Overload Protector Cycles
Repeatedly ......................................................10
3. Motor Runs But Cylinder Does Not Turn. .....10
4. Motor Does Not Stop .....................................10
5. Gas Burner Does Not Ignite ...........................11
6. Burner Ignites And Goes Out Repeatedly .....12
7. Burner Shuts off Prematurely ........................12
8. Burner Repeatedly Cycles Off On High Limit
Thermostat .....................................................13
9. Steam Valve or Burner Does Not Shut-off ...13
10. Clothes Do Not Dry .......................................14
11. Tumbler Overheating .....................................14
12. Burners Not Burning Properly - Gas Models 15
13. Loading Door Opens During Operation ........15
14. Tumbler Runs But No Steam To Coils - Steam
Models ............................................................15
15. Water In Steam Line - Steam Models ............16
16. Tumbler Will Not Start, Time On Drying Timer,
Door Closed ...................................................17
17. Motor Runs But Will Not Heat ......................18
18. Cylinder Turns, But Will Not Heat ................19
Section 4 – Grounding
19. Grounding Instructions ..................................21
Section 5 – Service Procedures
20. Access Panel/Interior Control Box ................23
21. Control Fuse Holder .......................................23
22. Control Fuse ...................................................24
23. Signal Buzzer .................................................24
24. Load Ready Light ..........................................25
25. Ignition Reset Switch .....................................25
26. Emergency Stop Switch .................................25
27. Push-To-Start Switch .....................................25
28. Cool Down and Heat Lights ..........................25
29. Cool Down and Heat Timers .........................27
30. Relay ..............................................................27
31. Reversing/Nonreversing Switch ....................27
32. Temperature Switch .......................................27
33. Temperature Control Board ...........................28
34. Electronic Control ..........................................28
35. Loading Door Assembly ................................30
36. Loading Door Handle ....................................30
37. Loading Door Switch .....................................30
38. Front Panel .....................................................31
39. Loading Door Hinge Lug ...............................33
40. Thermistor ......................................................33
41. Lint Panel Switch ...........................................34
42. Gas Valve .......................................................35
43. Igniter .............................................................35
44. Ignition Control ..............................................35
45. Burner Tube ...................................................35
46. Stove High Limit Thermostat ........................36
47. Cabinet High Limit Thermostat/ Load Ready
Thermostat .....................................................36
48. Steam Coils ....................................................37
49. Drive Guard Cover .........................................39
50. Airflow Switch ...............................................40
51. Cylinder Belt ..................................................40
52. Drive Belt .......................................................41
53. Step Pulley Assembly ....................................41
Critical Torques ....................................................42
54. Cylinder Sheave .............................................43
55. Motor Pulley ..................................................44
56. Jackshaft Assembly ........................................44
57. Cylinder Assembly ........................................44
58. Trunnion Bearings .........................................45
59. Fan Motor Drive And Fan Assembly ............46
60. Fan (60 Hertz Models) ...................................46
61. Fan (50 Hertz Models) ...................................46
62. Trunnion Shaft Assembly ..............................48
63. Cylinder Drive Motor ....................................49
64. Reversing Timer ............................................50
65. Reversing Contactor ......................................50
66. Fan Motor Contactor ......................................50
67. Transformer ...................................................50