LAARS NeoTherm NTV (Sizes 150–850 MBTU/h) - Install and Operating Manual - Manual (Page 81)

Page 77 N eo T herm Boilers and Water heaters
12 Internal fault:
Safety relay drive cap short H Internal fault
1. Reset module
2. If fault repeats, replace module.
13 Internal fault:
PII (Pre-Ignition Interlock)
shorted to ILK (Interlock)
H or L Internal fault
1. Reset module
2. If fault repeats, replace module.
15 Internal fault:
Safety relay test failed due to
feedback ON
L Internal fault
1. Reset module
2. If fault repeats, replace module.
16 Internal fault:
Safety relay test failed due to
safety relay OFF
L Internal fault
1. Reset module
2. If fault repeats, replace module.
17 Internal fault:
Safety relay test failed due to
safety relay not OFF
L Internal fault
1. Reset module
2. If fault repeats, replace module.
18 Internal fault:
Safety relay test failed due to
feedback not ON
L Internal fault
1. Reset module
2. If fault repeats, replace module.
19 Internal fault:
Safety RAM write L Internal fault
1. Reset module
2. If fault repeats, replace module.
20 Internal fault:
Internal fault: Flame ripple and
overflow
H Internal fault
1. Reset module
2. If fault repeats, replace module.
21 Internal fault:
Flame number of sample
mismatch
H Internal fault
1. Reset module
2. If fault repeats, replace module.
22 Internal fault:
Flame bias out of range H Internal fault
1. Reset module
2. If fault repeats, replace module.
23 Internal fault:
Bias changed since heating cycle
starts
H Internal fault
1. Reset module
2. If fault repeats, replace module.
24 Internal fault:
Spark voltage stuck low or high H Internal fault
1. Reset module
2. If fault repeats, replace module.
25 Internal fault:
Spark voltage changed too much
during flame sensing time
H Internal fault
1. Reset module
2. If fault repeats, replace module.
26 Internal fault:
Static flame ripple H Internal fault
1. Reset module
2. If fault repeats, replace module.
Code Description L or H Procedure