LAARS NeoTherm NTV (Sizes 399-850 MBTU/h) - Service Manual - Manual (Page 103)

93
Service Manual - NeoTherm 500
Appendix 1 - Error Codes (continued)
Code Description L or H Procedure
79 Outlet high limit H or L 1. Check wiring and correct any possible errors. See
Section B7.
2. Replace the outlet high limit.
3. If previous steps are correct and fault persists, re-
place the module.
80 DHW (Domestic Hot Water) high limit H or L 1. Check wiring and correct any possible errors.
2. Replace the DHW high limit.
3. If previous steps are correct and fault persists, re-
place the module.
81 Delta T limit H or L 1. Check inlet and outlet sensors and pump circuits for
proper operation.
2. Recheck the Delta T Limit to confirm proper setting.
3. If previous steps are correct and fault persists, re-
place the module.
82 Stack limit H or L 1. See Section B24.
2. Check wiring and correct any possible errors.
3. Replace the stack high limit switch.
4. If previous steps are correct and fault persists, re-
place the module.
91 Inlet sensor fault H 1. Check wiring and correct any possible errors. See
Section B28.
2. Replace the Inlet sensor.
3. If previous steps are correct and fault persists, re-
place the module.
92 Outlet sensor fault H 1. Check wiring and correct any possible errors. See
Section B30.
2. Replace the outlet sensor.
3. If previous steps are correct and fault persists, re-
place the module.
93 DHW (Domestic Hot Water) sensor fault H 1. Check wiring and correct any possible errors. See
Section B27.
2. Replace the DHW sensor.
3. If previous steps are correct and fault persists, re-
place the module.
94 Header sensor fault H 1. Check wiring and correct any possible errors.
2. Replace the header sensor.
3. If previous steps are correct and fault persists, re-
place the module.
95 Stack sensor fault H 1. Check wiring and correct any possible errors. See
Section B24.
2. Replace the stack sensor.
3. If previous steps are correct and fault persists, re-
place the module.
96 Outdoor sensor fault H 1. Check wiring and correct any possible errors. See
Section B33.
2. Replace the outdoor sensor.
3. If previous steps are correct and fault persists, re-
place the module.
App1
cont.