Laars MagnaTherm MGH1600 Installation And Operation Instructions For page 93

MagnaTherm Boilers and Water Heaters
16 Internal fault:
Safety relay test failed due to safety
relay OFF
17 Internal fault:
Safety relay test failed due to safety
relay not OFF
18 Internal fault:
Safety relay test failed due to feedback
not ON
19 Internal fault:
Safety RAM write
20 Internal fault:
Internal fault: Flame ripple and overflow
21 Internal fault:
Flame number of sample mismatch
22 Internal fault:
Flame bias out of range
23 Internal fault:
Bias changed since heating cycle starts
24 Internal fault:
Spark voltage stuck low or high
25 Internal fault:
Spark voltage changed too much during
flame sensing time
26 Internal fault:
Static flame ripple
27 Internal fault:
Flame rod shorted to ground detected
28 Internal fault:
A/D linearity test fails
29 Internal fault:
Flame bias cannot be set in range
30 Internal fault:
Flame bias shorted to adjacent pin
31 Internal fault:
SLO electronics unknown error
32-46 Internal fault:
Safety Key 0 through 14
47 Flame Rod to ground leakage
48 Static flame (not flickering)
49 24 VAC voltage low/high
L
L
Internal fault
1. Reset module
2. If fault repeats, replace module.
L
L
H
H
H
H
H
H
H
H
H
H
H
H
L
H
H
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.
Page 89