Emerson XJAL-020Z-CFV-012 - 2017 Emerson Climate Technologies, Inc

© 2017 Emerson Climate Technologies, Inc.
31
AE5-1377 R3
Code
Character
1
Code
Character
2
Fault Type
Trip to Set Point
Control Board
Actions
Auto
Resets
Possible Error and Solution
2
4
Discharge Gas
Overheat
Discharge
Temperatures over
270°F
-Stop the Unit
-Display DLT trip on
diagnostic
-Display waiting to
restart on diagnostic
-Auto start the unit
after 3 minutes
-Lockout unit if 6 trips
within 1 hour
5 Auto
Starts in 1
hour
-Verify system operations to be with in
unit pressure / temperature envelope of
the unit
-Review return gas temperatures at the
compressor.
2
5
High Pressure
Trip
-Contact open at 435
psig ±22psig
-Contact Close at
348 psig ±22psig
-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
within 1 hour
5 Auto
Starts in 1
Hour
-Check fan motor / blade operations,
verify wiring of the system.
-Blocked condenser, air re-circulation ,
Non Condensables
-Check liquid line solenoid valve, liquid
service valve, make sure they are open
2
7
Discharge
Line And Coil
in Temp
Sensors
Failure
(See Table
12)
-Actual DLT>320°F
~DLT Sensor Fails
and actual DLT>
176°F
-Both coil-in and DLT
sensors fail (short
circuit)
(Only in XJAL)
-Stop the unit
-Display DLT sensor
failure on the
diagnostic
-Display waiting to
restart on diagnostic
-Auto start the unit
after 3 minutes
Auto Start
-Verify proper connection at the main
control board
-Verify the resistance of the two
sensers See Table 12
4
1
Reverse
Phase/Loss of
phase
(3 phase only)
Incorrect Voltage
sequence
-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 Power
board, see wiring diagram for
applicable sequence. Verify voltage
sequence at line side of unit terminal
block. See wiring diagram
4
3
Over Current
Set based on
Compressor
-Stop the Unit
-Display over current
trip on diagnostic
-Auto start the unit
after 3 minutes
-Lockout unit if 6 trips
in less than 12 hour
5 Auto
Starts in 1
Hour
* Check rotary switch, make sure it is
on the right position according to the
unit model, Reference Table 7
* Check system operating pressures
* Check voltage supply at the
compressor terminals, must be with in
the +/- 10% voltage tolerance of the
compressor nameplate.