System Diagnostics/Troubleshooting Information (Table 9) - Emerson Copeland Scroll Installation And Reference Manual

Note:
*
Reference Figure 3, Page 8 for Control Board Three Minute Time Delay functionality
Trip to
Fault Type
Set Point
Reverse
Phase/Loss Incorrect Voltage
of phase (3 sequence
phase only)
Occurs on:
-initial unit start,
-When power is
reset
Fresh Start <95°F ambient
Compressor is
cycled off > than
1 hour < than
95° F ambient
-Contact open at
435 psig ±22psig
High
-Contact Close
Pressure Trip
at 348 psig
±22psig
Discharge
Discharge
Temperatures
Gas Overheat
over 270°F
© 2011 Emerson Climate Technologies
Printed in the U.S.A.
Application Engineering
B U L
Table 9 – System Diagnostic Information
Code Code
Char. Char.
1 2
5 1
2 0
5 5
4 4
2 4
5 4
L E T
Control Board
Actions
-Stop the unit
-Display the incorrect
phase
-Display waiting to
restart on diagnostic
*
- Check the phase
sequence after 3
minutes
-Compressor runs 3
sec and stops 20 sec
-After 3 cycles,
compressor runs
continuously
-Display fresh start on
diagnostic
-Stop the Unit
-Display HP trip on
diagnostic
-Display waiting to
restart on diagnostic
*
- Auto start the unit
after 3 minutes
-Lockout unit if 6 trips
in less than 12 hours
-Display HP lockout
on diagnostic
-Stop the Unit
-Display DLT trip on
diagnostic
-Display waiting to
restart on diagnostc
*
- Auto start the unit
after 3 minutes
-Lockout unit if 6 trips
in less than 12 hour
-Display DLT overheat
lockout on diagnostic
15
I N
AE5-1377 R2
Auto Possible Error and
Resets Solution
-Check Voltage sequence
of the control board
whether it is same as the
Auto
compressor;
Start
-Change the voltage
sequence at circular
break
-Nothing is wrong, just
Auto
wait until compressor
Start
runs continuously.
-Check whether HP
cutout functions
properly or is connected
to control board;
5 Auto
-Check whether
Starts in
condenser fan can run;
1 Hour
-Check liquid line
solenoid valve, liquid
service valve, make sure
they are open;
-Check liquid line sight
5 Auto glass
Starts in -Check the injection
1 hour feature for proper
operation