A115_O: EXV Sensor Measurement Error.
Status
This is an active alarm.
Description
This fault will occur if the outdoor suction thermistor accuracy has drifted for 3 days in a row. EXV will operate at 50% open on a call for heat to keep unit online.
Cause
1. Control board will once a day in heat mode, compare the suction thermistor against the coil thermistor 30 minutes after a cycle as ended. If they have not come into line within 20 degrees of each other,3 days in a row the alarm will be set.
Solution
1.Check suction and coil thermistors against a thermistor resistance chart, replace if necessary.
