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Alarm Codes
148
20
Engine Failed to Start
If unit is shutdown repair immediately. Otherwise, report
alarm at end of day.
X
21
Cooling Cycle Check
Manually monitor load temperature with independent
thermometer. Report alarm at end of day.
X
22
Heating Cycle Check
Manually monitor load temperature with independent
thermometer. Report alarm at end of day.
X
23
Cooling Cycle Fault
The indicated zone is no longer able to operate and has
been shut down. Repair immediately.
X
24
Heating Cycle Fault
The indicated zone is no longer able to operate and has
been shut down. Repair immediately.
X
25
Alternator Check
If unit is shutdown repair immediately. Otherwise, report
alarm at end of day.
X
26
Refrigeration Capacity
Manually monitor load temperature with independent
thermometer. Report alarm at end of day.
X
Table of Alarm Codes
NOTE: Not all alarm codes are available with all microprocessor controllers or all revisions of software.
Code Description
Corrective Action
Level Of
Action
Ok
T
o
Run
Che
c
k
Shut
Down