Trane Horizon OADG Series Installation, Operation And Maintenance Manual page 70

Alarms and Troubleshooting
Table 14. Diagnostic values (continued)
Name
Diagnostic: Space Humidity
BV-19
Source Failure
Diagnostic: Compressor Fail Unit
BV-22
Lockout
BV-24 Diagnostic: Exhaust Fan Failure Auto Reset
Diagnostic: Condensate
BV-28
Overflow Unit Lockout
Diagnostic: Low Refrigerant
BV-29
Pressure Circuit 2
Diagnostic: Duct Static Pressure
BV-30
Setpoint Range
Diagnostic: Liquid Line
BV-31 Refrigerant Pressure Circuit 1
Source Failure
Diagnostic: Liquid Line
BV-32 Refrigerant Pressure Circuit 2
Source Failure
Diagnostic: Low Outdoor Coil
BV-33
Water Flow
Diagnostic: Dehumidification
BV-34 Temperature Sensor Source
Failure
Diagnostic: Compressor 1 Run
BV-35
Failure
Diagnostic: Duct Static Pressure
BV-36
Source Failure
Diagnostic: Outdoor Coil Water
BV-37
Temperature Low
Diagnostic: Low Refrigerant
BV-38
Pressure Circuit 1
70
Manual or Auto Reset
Auto Reset. Occurs when the space
humidity active falls outside of
range
Manual Reset
Auto Reset
Auto Reset
Auto Reset
Auto Reset
Auto Reset
Auto Reset
Auto Reset
Manual or Auto Reset
Auto Reset
Auto Reset
Auto Reset
Possible Causes
• BAS communication down
• Failed sensor or improper sensor installation
• Humidity Wiring Polarity sensitive
Occurs when there is a compressor run failure and the
discharge air temperature is 5°F from setpoint, or the
dehumidification temperature is 5°F during dehumidification.
Occurs when there is a call for exhaust fan but there is no
status for three minutes
• Occurs when the condensate switch is open and the discharge
air temperature is 5°F from setpoint, or the dehumidification
temperature is 5°F during dehumidification.
• Shuts down entire unit until 5 minutes after the condensate
switch closes.
Occurs when circuit 2 is running and the suction pressure
transducer reads below 90PSI (cooling) or 55PSI (heat pump)
for two minutes.
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.
Occurs when circuit 1 is running and the liquid line transducer
is outside of the 150- 650PSI range for two minutes.
Occurs when circuit 2 is running and the liquid line transducer
is outside of the 150- 650PSI range for two minutes.
• Occurs when the supply fan is
• running and the outdoor coil water flow switch is open.
• Occurs when the indoor coil leaving or discharge air
temperature/humidity sensor
• falls outside of range.
• Occurs when there is a call for a compressor without a run status
for five minutes. Auto
• resets after three hours.
• Occurs when the supply duct
• static pressure transducer reading falls outside of range.
Occurs when the supply fan is running and the outdoor coil
water low temperature switch is open.
Occurs when circuit 1 is running and the suction pressure
transducer reads below 90PSI (cooling) or 55PSI (heat pump)
for two minutes.
OAU-SVX006E-EN