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T-368
4–34
AL25
CONDENSER IP
Cause:
Condenser fan motor internal protector (IP) is open.
Component
Insufficient Air Flow
Troubleshooting
Shut down unit and check condenser fan for obstructions.
Corrective Action
Remove obstructions.
Component
Condenser Fan Motor
Troubleshooting
Shut down unit, disconnect power, & check Condenser Fan Motor IP at
plug connection pins 1 & 2.
Corrective Action
Replace defective condenser fan motor, refer to Condenser Fan Motor As-
sembly Service
AL26
ALL SENSORS FAILURE: SUPPLY/RETURN PROBES
Cause:
Sensors out of range.
Component
All sensors detected as out of range
Troubleshooting
Perform Pre-trip P5:
Corrective Action
If P5 passes, no further action is required.
If P5 fails, replace the defective sensor as determined by P5, refer to TEM-
PERATURE SENSOR Service
.
AL27
ANALOG TO DIGITAL ACCURACY FAILURE
Cause:
Controller AD converter faulty.
Component
Controller
Troubleshooting
Power cycle the unit. If the alarm persists, it indicates a defective micropro-
cessor.
Corrective Action
Replace defective microprocessor, refer to Controller Service
.
AL29
AUTOFRESH FAILURE
Cause:
Alarm 29 is triggered if CO
2
or O
2
level is outside of the limit range and the vent position is at 100%
for longer than 90 minutes.
Component
Alarm LED will be activated and user intervention is required.
Troubleshooting
Refer to eAutoFresh manual.
Corrective Action
The alarm is triggered off when atmospheric conditions are within limit set-
tings.
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