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© 2016 Emerson Climate Technologies, Inc.
AE5-1412 R1
Code
Description
Alarm Level
Diagnostic Resolution
Possible Fix
E25
L25
Open start circuit error/
lockout
Alarm
Lockout
Check start capacitor
Check start component wiring
per diagram
Check wires are properly routed
through controller current
transducers per wiring diagram
E26
L26
Under voltage alarm/
lockout
Alarm
Lockout
Check incoming power
E27
L27
Over voltage alarm/
lockout
Alarm
Lockout
Check incoming power
E28
Compressor protector
trip
Warning
Check to see if compressor is
tripped on protector
Check to see if contactor is
functioning properly
Check contractor control circuit
wiring per wiring diagram
E40
L40
High pressure switch
trip/ lockout
Alarm
Lockout
Check system cause of high
pressure trip
Check if circuit breaker is
tripped (It provides power to the
high pressure switch)
Ensure wiring to terminal C2
of the controller is correct per
the wiring diagram and C2 is
receiving power.
Verify high pressure switch
is working properly or needs
replaced
E44
L44
Discharge line
temperature alarm/
lockout
Alarm
Lockout
Check system cause of high
DLT
Faulty temperature sensor.
Check sensor values versus
section 12.
E46
High condenser
temperature alarm
Alarm
Check to see what is causing
the system to run at a higher
condensing temperature
Faulty temperature sensor.
Check sensor values versus
section 12.
E47
Over injection (XFALs
only)
Warning
E48
Refrigerant shortage
(XFALs only)
Warning
Check refrigerant charge
EVI injection valve may not be
clogged or blocked
E50
High side flood back
alarm
Warning
Check to see if proper
superheat is being maintained
E80
Rtc warning, date not
correct
Warning
Set the real time clock
E81
Rtf warning,
communication error
Warning
Reload factory settings with the
hotkey and reset the real time
clock
Replace faulty controller
E82-E85
Configuration Errors
Alarm
Reload factory settings with the
hotkey
Replace faulty controller
L86
EEPROM Memory
Error
Lockout
Reload factory settings with the
hotkey
Replace faulty controller
