Operating instructions

55
Index to troubleshooting guide.
The following is an index to possible control-related problems described on the following pages. To find
solutions, refer to either the problem number or the page number shown.
# Description
1. Green power indicator light is off .................. Page 56
2. No remote fault indication ............................. Page 56
3. No readable information on keypad/display .. Page 56
Faults
4. Humidity transmitter fault .............................. Page 56
5. Dew point transmitter fault ............................ Page 56
6. Humidistat fault .............................................. Page 57
7. VAV humidity transmitter fault ..................... Page 57
8. Temp comp transmitter fault .......................... Page 57
9. Fill fault .......................................................... Page 57
10. Drain fault ...................................................... Page 58
11. Low water timer fault ..................................... Page 58
12. LL probe fault ................................................ Page 58
13. ML probe fault ............................................... Page 59
14. Replace probes fault ....................................... Page 59
15. Probe assembly fault ...................................... Page 59
16. Temperature sensor fault ................................ Page 59
17. Thermal trip fault ........................................... Page 59
18. SDU fault........................................................ Page 59
19. EEPROM fault ............................................... Page 59
20. Flue fault ........................................................ Page 60
21. Burner # fault ................................................. Page 60
22. Ignitor # fault .................................................. Page 60
23. Blower # fault ................................................. Page 60
24. Slave # fault.................................................... Page 61
Operation problems
25. Control does not energize............................... Page 61
26. Unit does not fill with water......................Page 61-62
27. Fill valve does not close ............................Page 63-64
28. Reduced or no output ..................................... Page 64
29. Fill valve cycles on and off frequently........... Page 65
30. Heater burnout ................................................ Page 65
31. Noisy operation .............................................. Page 66
32. Humidity below desired level ...................Page 67-68
33. Humidity above set point ..........................Page 68-69
34. Hunting ........................................................... Page 69
35. Will not perform autodrain............................. Page 70
Operation
Operation:
Index to troubleshooting guide