Emerson Copeland EazyCool OM 501 Series Application Manuallines page 65

Code Description
E43 Low pressure alarm
E44 Discharge line temperature alarm
L44 Discharge line temperature lockout
E45 High condenser pressure alarm
E46 High condenser temperature alarm
E47 EXV full open in EVI
E48 Refrigerant shortage error in EVI
C6.1.9/0617/E
Cause Action
Only ON/OFF Warning signal only
configuration: suction
pressure is lower than
Cut out value and lower
than parameter D29 for
D12 time
DGT compressor main
configutaion: suction
pressure is lower than
D29 for D12 time
Discharge line The compressor will be tripped
temperature higher
than D22 for D24
seconds
Discharge line The compressor will be locked(if D26
temperature over-heat equal to 0, compressor no lockout)
happened for D26
times within one hour
Condenser pressure The compressor is activated according
larger than E58 for E59 to E60
minutes
Condenser The compressor is activated according
temperature larger than to E60
E58 for E59 minutes
EXV full open for F40 Warning signal only
minutes
EXV full open and PHE Warning signal only
super heat is larger
than (F28/F29.../F37 +
F39) (F28/F29.../F37
depends on refrigerant
type)
Reset
Suction pressure increase than parameter D29
or Cut out value
Automatically: discharge line temperature lower
than D23 setting and D25 delay time out
Hold "start" button for 5s or manual power on
and off(if D26 equal to 0, compressor
automatically start when discharge line
temperature lower than D23 setting and D25
delay time out)
Automatically: as soon as condenser pressure
lower than E61
Automatically: as soon as condenser
temperature lower than E61
Automatically: as soon as EXV is not at
maximum steps
Automatically: as soon as PHE super heat is
lower than (F28/F29.../F37 + F39)
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