A.O. Smith 2000 Boiler User Manual


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62
CODE DESCRIPTION RECOMMENDED TROUBLESHOOTING OF
LOCKOUT CODES
NOTE
30 Internal fault: Flame bias shorted to adjacent pin Internal Fault.
1. Reset Module.
2. If fault repeats, replace module.
H
31 Internal fault: SLO electronics unknown error H
32 - 46 Internal fault: Safety Key 0 through 14 L
System Errors
47 Flame Rod to ground leakage H
48 Static ame (not ickering) H
49 24 VAC voltage low/high 1. Check the Module and display connections.
2. Check the Module power supply and make sure
that both frequency, voltage and VA meet the
specications.
H
50 Modulation fault Internal sub-system fault.
1. Review alert messages for possible trends.
2. Correct possible problems.
3. If fault persists, replace module.
H
51 Pump fault H
52 Motor tachometer fault H
53 AC inputs phase reversed 1. Check the Module and display connections.
2. Check the Module power supply and make
sure that both frequency and voltage meet the
specications.
3. On 24 VAC applications, assure that J4-10 and
J8-2 are connected together.
L
54 Safety GVT model ID does not match application's
model ID
Contact the service professional. L
55 Application conguration data block CRC errors Contact the service professional. L
56 - 57 RESERVED
58 Internal fault: HFS shorted to IAS Internal Fault.
1. Reset Module.
2. If fault repeats, replace module.
L
59 Internal Fault: Mux pin shorted L
Normal Event Status
60 Internal Fault: HFS shorted to LFS L
61 Anti short cycle Will not be a lockout fault. Hold Only. H
62 Fan speed not proved H
63 LCI OFF 1. Check wiring and correct any faults.
2. Check Interlocks connected to the LCI to assure
proper function.
3. Reset and sequence the module; monitor the LCI
status.
4. If code persists, replace the module.
H
64 PII OFF 1. Check wiring and correct any faults.
2. Check Preignition Interlock switches to assure
proper functioning.
3. Check the valve operation.
4. Reset and sequence the module; monitor the PII
status.
5. If code persists, replace the module.
H or L
65 Interrupted Airow Switch OFF 1. Check wiring and correct any possible shorts.
2. Check airow switches to assure proper
functioning.
3. Check the fan/blower operation.
4. Reset and sequence the module; monitor the
airow status.
5. If code persists, replace the module.
H or L
66 Interrupted Airow Switch ON H or L
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