A.O. Smith 3400 - Manual (Page 60)

60
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 sensor to ground leakage H
48 Static flame (not flickering) 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
specifications.
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
specifications.
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 qualified service technician. L
55 Application configuration data block CRC errors Contact the qualified service technician. 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 Airflow Switch OFF 1. Check wiring and correct any possible shorts.
2. Check airflow switches to assure proper
functioning.
3. Check the fan/blower operation.
4. Reset and sequence the module; monitor the
airflow status.
5. If code persists, replace the module.
H or L
66 Interrupted Airflow Switch ON H or L