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T-340
4–36
Figure 4.13 Alarm Troubleshooting Sequence
Start
Unit
configured
correctly?
Pass
Pre-trip
inspection?
Active
Alarms?
Correct
software
version?
Did
Evaporator
fans start?
Operating
pressures
normal?
Check Power
Supply
Install Latest
Software
Revision
Load correct
unit
configuration
See alarm
details &
repair
Correct
all faults
Yes
Yes
Yes
Yes
No
Yes
No
Yes
No
No
No
No
Correct
Refrigerant
issue
Unit OK
Yes
No
Check Power
Supply
Unit does
self test?
Refer to Connect Power
Refer to Connect Power
Refer to Controller Software
Refer to Configuration Software Variables
Refer to Controller Alarm Indications
Refer to Pre-Trip Diagnostics
Refer to Refrigeration System Service