Laars Neotherm NTH, Installation And Operation Instruction Manual

Page: 87 / 104

Page 87
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
18 Internal fault:
Safety relay test failed due to
feedback not ON
L
19
Internal fault:
Safety RAM write
L
20 Internal fault:
Internal fault: Flame ripple and
overfl ow
H
21 Internal fault:
Flame number of sample
mismatch
H
22 Internal fault:
Flame bias out of range
H
23 Internal fault:
Bias changed since heating cycle
starts
H
24 Internal fault:
Spark voltage stuck low or high
H
25 Internal fault:
Spark voltage changed too much
during fl ame sensing time
H
26 Internal fault:
Static fl ame ripple
H
27 Internal fault:
Flame rod shorted to ground
detected
H
28 Internal fault:
A/D linearity test fails
H
29
Internal fault:
Flame bias cannot be set in
range
H
30 Internal fault:
Flame bias shorted to adjacent
pin
H
31 Internal fault:
SLO electronics unknown error
H
32-
46 Internal fault:
Safety Key 0 through 14
L
47 Flame Rod to ground leakage H
48
Static fl ame (not fl ickering)
H
Code Description Lockout
or Hold
Procedure
N
EO
T
HERM
Commercial Boilers and Water Heaters