Emerson Copeland Scroll Installation And Reference Manual

16
© 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
Over Current
Set based on
Compressor
52
-Stop the Unit
-Display over current
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 hour
-Display over current
lockout on diagnostic
Auto
Start
-Check rotarty switch,
make sure it is on the
right position according
to the unit model;
-Check oil level through
compressor sight glass
(Low temp unit only);
-Check accumulator
(Low temp unit only),
inlet should connect
to return gas service
valve.
Electrical
Failure
Compressor
intends to start
but current
transformers
sense no
current
52
-Display compressor
protector trip on
diagnostic
-Auto Start When
protector resets
Auto
Start
-Check whether contact
is pull-in? If not, check
wiring of contact coil;
-Check wiring, make
sure compressor is
connected to contactor,
and is powered;
-Compressor motor
thermal protector trips,
wait until it resets.
Compressor
Rapid Cycling
*Minimum 3
minutes off time
between starts
20
-*Delay compressor
start, if minimum off
time is less than 3 min
-Display about to turn
on diagnostic
Auto
Start
-Compressor start
signal is active when
unit stops; the only
thing needed to do is
wait until the unit starts
Ambient
Temperature
Sensor Failure
(See Table 10)
Ambient sensor
reads
< -22°F or
>145°F
18
-Display ambient temp
sensors failure on
diagnostic
-Continue to run the
unit on default mode.
Run
-check whether actual
ambient temperature is
out of range;
-Check whether
ambient sensor is
OK and connected to
control board.
Condensor
Mid-Coil
Sensor Failure
(See Table 10)
Mid-coil sensor
reads
< -22°F or
>145°F
19
-Display mid-coil temp
sensors failure on
diagnostic
-Continue to run the
unit on default mode.
Run
-check whether actual
mid-coil temperature is
out of range;
-Check whether mid-
coil sensor is OK and
connected to control
board.
Table 9 Continued

Emerson Copeland Scroll Specifications

General

Brand	Emerson
Model	Copeland Scroll
Category	Air Conditioner
Language	English