LAARS NeoTherm NTV (Sizes 399-850 MBTU/h) - Service Manual - Manual (Page 109)

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Service Manual - NeoTherm 500
Code Description L or H Procedure
178 Safety relay on at safe start check L Internal fault.
1. Reset module.
2. If fault repeats, replace module.
184 Invalid blower/ HSI output setting L 1. Return to configuration mode and recheck selected
parameters, reverify and reset module.
2. If fault repeats, verify electrical grounding.
3. If fault repeats, replace module.
185 Invalid Delta T limit enable setting L 1. Return to configuration mode and recheck selected
parameters, reverify and reset module.
2. If fault repeats, verify electrical grounding.
3. If fault repeats, replace module.
186 Invalid Delta T limit response setting L 1. Return to configuration mode and recheck selected
parameters, reverify and reset module.
2. If fault repeats, verify electrical grounding.
3. If fault repeats, replace module.
187 Invalid DHW (Domestic Hot Water) high limit
enable setting
L 1. Return to configuration mode and recheck selected
parameters, reverify and reset module.
2. If fault repeats, verify electrical grounding.
3. If fault repeats, replace module.
188 Invalid DHW (Domestic Hot Water) high limit
response setting
L 1. Return to configuration mode and recheck selected
parameters, reverify and reset module.
2. If fault repeats, verify electrical grounding.
3. If fault repeats, replace module.
189 Invalid flame sensor type setting L 1. Return to configuration mode and recheck selected
parameters, reverify and reset module.
2. If fault repeats, verify electrical grounding.
3. If fault repeats, replace module.
192 Invalid igniter on during setting L 1. Return to configuration mode and recheck selected
parameters, reverify and reset module.
2. If fault repeats, verify electrical grounding.
3. If fault repeats, replace module.
193 Invalid ignite failure delay setting L 1. Return to configuration mode and recheck selected
parameters, reverify and reset module.
2. If fault repeats, verify electrical grounding.
3. If fault repeats, replace module.
194 Invalid ignite failure response setting L 1. Return to configuration mode and recheck selected
parameters, reverify and reset module.
2. If fault repeats, verify electrical grounding.
3. If fault repeats, replace module.
195 Invalid ignite failure retries setting L 1. Return to configuration mode and recheck selected
parameters, reverify and reset module.
2. If fault repeats, verify electrical grounding.
3. If fault repeats, replace module.
Appendix 1 - Error Codes (continued)
App1
cont.