Laars NTH, Инструкция по установке и эксплуатации

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Page 69
N
EO
T
HERM
Boilers and Water Heaters
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
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
specifi cations.
Code Description Lockout
or Hold
Procedure