LAARS NeoTherm NTV (Sizes 399-850 MBTU/h) - Service Manual - Manual (Page 101)

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Service Manual - NeoTherm 500
Appendix 1 - Error Codes (continued)
Code Description L or H Procedure
26 Internal fault:
Static flame ripple H Internal fault
1. Reset module
2. If fault repeats, replace module.
27 Internal fault:
Flame rod short to ground detected H Check flame rod - See Section B37.
Internal fault in SOLA controller:
1. Reset module
2. If fault repeats, replace module.
28 Internal fault:
A/D linearity test fails H Internal fault
1. Reset module
2. If fault repeats, replace module.
29 Internal fault:
Flame bias cannot be set in range H Internal fault
1. Reset module
2. If fault repeats, replace module.
30 Internal fault:
Flame bias shorted to adjacent pin H Internal fault
1. Reset module
2. If fault repeats, replace module.
31 Internal fault:
SOLA electronics unknown error H Internal fault
1. Reset module
2. If fault repeats, replace module.
32-46 Internal fault:
Safety key 0 through 14
L Internal fault
1. Reset module
2. If fault repeats, replace module.
47 Flame rod to ground leakage H Check flame rod - See Section B37.
Internal fault in SOLA controller: Internal fault
1. Reset module
2. If fault repeats, replace module.
48 Static flame (not flickering) H Internal fault
1. Reset module
2. If fault repeats, replace module.
49 24 VAC voltage low/high H 1. Check the module and display connections.
2. Check the module power supply and make sure that
frequency, voltage and VA meet the specifications. See
Section B2.
50 Modulation fault H Internal sub-system fault.
1. Review alert messages for possible trends.
2. Correct possible problems.
51 Pump fault H Internal sub-system fault.
1. Review alert messages for possible trends.
2. Correct possible problems.
52 Motor tachometer fault H Check the blower. See Section B22.
Internal sub-system fault in SOLA controller:
1. Review alert messages for possible trends.
2. Correct possible problems.
App1
cont.