Laars MagnaTherm MGH1600, Installation And Operation Instructions For

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MagnaTherm Boilers and Water Heaters
Page 89
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 overflow
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
flame sensing time
H
26 Internal fault:
Static flame 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 flame (not flickering) H
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.