Check Spare Digital Outputs

Problem in the circuit of an auxiliary digital output (relay or command).

Possible causes

Relay coil burned or defective
Short circuit to ground on auxiliary output
Blown output fuse in the module

Recommended actions

Check if unit shut down for safety
Measure resistance in the output circuit
Replace output component if damaged

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00No Alarms Exist 02Check Evaporator Coil Sensor (Zone)03Check (Control) Return Air Sensor (Zone)04Check (Control) Discharge Air Sensor (Zone)05Check Ambient Temp Sensor 06Check Coolant Temp Sensor

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