Alarms and Troubleshooting
OAU-SVX01K-EN
79
BV-42
Diagnostic: Heat Failure
Auto Reset (4 hours). Occurs when
there is a call for heat but the heat
status relay is not energized. The
heat is cycled three times and then
locked out for four hours before
retrying
• Trips after heat command ON and no GV status offer 1 minute
• No gas, low gas pressure or high gas pressure to unit
• Unit Manual shutoffs closed
• Heater inducer failure
• Heat relay failure
• Loose or incorrect wiring
BV-46
Diagnostic: Not Economizing
When It Should Be Economizing
Auto Reset
Occurs when the unit is in economizer mode and the outdoor
air damper feedback status is greater than 20% lower than
the output.
BV-47
Diagnostic: Return Duct/Space
Pressure Setpoint Range
Auto Reset
Occurs when the duct static setpoint is above 85% of the
maximum limit for the hardwired input, below 5% of the full
scale input, or less than the minimum.
BV-48
Diagnostic: Damper Not
Modulating
Auto Reset
Occurs when the outdoor air damper position feedback is
more more than 20% off than the output.
BV-50
Diagnostic: Space CO2 Source
Failure
Auto Reset
Occurs when the space CO2 reading falls outside of range.
BV-52
Diagnostic: Compressor 2 Run
Failure
Manual or Auto Reset
Occurs when there is a call for a compressor without a run
status for five minutes. Auto resets after three hours.
BV-53
Diagnostic: Compressor 3 Run
Failure
Manual or Auto Reset
Occurs when there is a call for a compressor without a run
status for five minutes. Auto resets after three hours.
BV-54
Diagnostic: Compressor 4 Run
Failure
Manual or Auto Reset
Occurs when there is a call for a compressor without a run
status for five minutes. Auto resets after three hours.
BV-55
Diagnostic: Return Duct/Space
Pressure Source Failure
Auto Reset
Occurs when the return duct/space pressure transducers falls
outside of range.
BV-56
Diagnostic: Outdoor Air Flow
Sensor Source Failure
Auto Reset
Occurs when the outdoor air damper is above 15% and the
outdoor air flow measurement shows less than 50cfm.
BV-58
Diagnostic: Compressor 5 Run
Failure
Manual or Auto Reset
Occurs when there is a call for a compressor without a run
status for five minutes. Auto resets after three hours.
BV-59
Diagnostic: Compressor 6 Run
Failure
Manual or Auto Reset
Occurs when there is a call for a compressor without a run
status for five minutes. Auto resets after three hours.
BV-60
Diagnostic: Energy Recovery
Wheel Rotation Failure
Auto Reset
Occurs when there is a call for the ERV but rotation was not
detected for five minutes.
Table 19. Diagnostic values (continued)
Name
Manual or Auto Reset
Possible Causes:
