Emerson Copeland Scroll Installation And Reference Manual

15
© 2011 Emerson Climate Technologies
Printed in the U.S.A.
AE5-1377 R2
Application Engineering
BULLETIN
Fault Type
Trip to
Set Point
Code
Char.
1
Code
Char.
2
Control Board
Actions
Auto
Resets
Possible Error and
Solution
Reverse
Phase/Loss
of phase (3
phase only)
Incorrect Voltage
sequence
51
-Stop the unit
-Display the incorrect
phase
-Display waiting to
restart on diagnostic
-*Check the phase
sequence after 3
minutes
Auto
Start
-Check Voltage sequence
of the control board
whether it is same as the
compressor;
-Change the voltage
sequence at circular
break
Fresh Start
Occurs on:
-initial unit start,
-When power is
reset
<95°F ambient
Compressor is
cycled off > than
1 hour < than
95° F ambient
20
-Compressor runs 3
sec and stops 20 sec
-After 3 cycles,
compressor runs
continuously
-Display fresh start on
diagnostic
Auto
Start
-Nothing is wrong, just
wait until compressor
runs continuously.
High
Pressure Trip
-Contact open at
435 psig ±22psig
-Contact Close
at 348 psig
±22psig
55
-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
5 Auto
Starts in
1 Hour
-Check whether HP
cutout functions
properly or is connected
to control board;
-Check whether
condenser fan can run;
-Check liquid line
solenoid valve, liquid
service valve, make sure
they are open;
Discharge
Gas Overheat
Discharge
Temperatures
over 270°F
4
2
5
4
4
4
-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
5 Auto
Starts in
1 hour
-Check liquid line sight
glass
-Check the injection
feature for proper
operation
Table 9 – System Diagnostic Information
Note:
* Reference Figure 3, Page 8 for Control Board Three Minute Time Delay functionality

Emerson Copeland Scroll Specifications

General

Brand	Emerson
Model	Copeland Scroll
Category	Air Conditioner
Language	English