York Sun Premier GZA1M Series, Start-Up & Operation

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YORK
Start-Up & Operation Guide | 5587001-YSG-A-520
117
Operation
Faults
Table 33: Faults List
Fault Type Description Caused By
Critical Circuit 1 locked out due to safety chain
One of the safety chain switches has
opened three times
Critical Circuit 2 locked out due to safety chain
One of the safety chain switches has
opened three times
Critical Circuit 1 locked out due to low pressure Low pressure switch tripped three times
Critical Circuit 2 locked out due to low pressure Low pressure switch tripped three times
Critical C1A locked out due to high pressure HP switch has tripped three times
Critical C1B locked out due to high pressure HP switch has tripped three times
Critical C1C locked out due to high pressure HP switch has tripped three times
Critical C2A locked out due to high pressure HP switch has tripped three times
Critical C2B locked out due to high pressure HP switch has tripped three times
Critical C2C locked out due to high pressure HP switch has tripped three times
Critical C1A locked out due to low pressure LP switch has tripped three times
Critical C1B locked out due to low pressure LP switch has tripped three times
Critical C1C locked out due to low pressure LP switch has tripped three times
Critical C2A locked out due to low pressure LP switch has tripped three times
Critical C2B locked out due to low pressure LP switch has tripped three times
Critical C2C locked out due to low pressure LP switch has tripped three times
Critical Unit shutdown due to smoke, etc.
A device in the shut down circuit has
opened
Critical Exhaust/return fan VFD failure
Abnormal condition exists on the exhaust/
return fan VFD
Critical Supply fan VFD 1 failure
Abnormal condition exists on the supply
fan 1 VFD
Critical Supply fan VFD 2 failure
Abnormal condition exists on the supply
fan 2 VFD
Critical No heat/cool due to unreliable space temperature There is no reliable space temperature
reference
Critical Option communication failure
Loss of communication to options board.
Check SA bus wiring and connections
Critical
Building system interface board communication
failure
Loss of communication to building system
interface board. Check SA bus wiring and
connections
Critical Condenser 1 communication failure
Loss of communication to refrigeration
1 board. Check SA bus wiring and
connections
Critical Condenser 2 communication failure
Loss of communication to refrigeration
2 board. Check SA bus wiring and
connections
Critical Outputs disabled due to low input V
Loss of 24 VAC power to 24 VAC
OUTPUT terminal
Critical Outputs limited due to brownout input V Low voltage on 24 VAC OUTPUT terminal
Critical Cooling locked out - condensate overflow Condensate drain is clogged
Critical Unit locked out due to high duct static pressure
Duct static pressure has exceeded
setpoint