Table 11 - System Diagnostic Information - Emerson XJAL-020Z-CFV-012 Manual

Code Code
Character Character Fault Type
1 2
Low Pressure
0 0
Cutout
1 0
No Fault
Electrical
1 2
Failure
Discharge
Line And Coil
in Temp
1 7
Sensors
Failure
(See Table
12)
Ambient
Temperature
1 8
Sensor Failure
(See Table
12)
Condensor
Mid-Coil
1 9
Sensor Failure
(See Table
12)
PHE vapor in
sensor failure
(Only in XJAL
1 A
CDU)
(See Table
12)
© 2017 Emerson Climate Technologies, Inc.

Table 11 - System Diagnostic Information

Control Board
Trip to Set Point
Actions
Loss of Low
Pressure Control - Stop the Unit
Signal
No Fault No Action
-Display compressor
Compressor intends
protector trip on
to start but current
diagnostic
transducers on main
control board sense -Auto Start When
no current protector resets
-Actual DLT>320°F
~DLT Sensor Fails
and actual DLT>
-Display DLT sensor
176°F
failure on diagnostic
-Both coil-in and DLT
sensors fail (short
-Continue to run the
circuit)
unit on default mode
-Coil Sensor fails
(open) and actual
DLT is <163°F
-Display ambient temp
sensors failure on
Ambient sensor
diagnostic
reads < -22°F or
>145°F -Continue to run the
unit on default mode.
-Display mid-coil temp
sensors failure on
Mid-coil sensor
diagnostic
reads < -22°F or
>145°F -Continue to run the
unit on default mode.
-Vapor in sensor
-Display sensor error
reads <3.2°F or
on diagnostics
>163°F
-Continue to run unit
-Ambient temp reads
on default mode
>50°F
29
AE5-1377 R3
Auto
Possible Error and Solution
Resets
Suction Pressure below Cutout Set
Point, normal operation for pump down
Auto Start
system control. Unit in standby mode of
operation
Run No Fault, Unit Running
-Verify proper system voltage at the
compressor
-Verify start component operation ( if
single phase )
Auto Start
-Verify all phases are present, ( three
phase ) verify operation of the unit
contactor.
-Verify proper connection at the main
control board
Run
-Verify the resistance of the two
sensers See Table 12
-Verify proper connection at the main
control board
Run
-Verify the resistance of the sensor.
See Table 12
-Verify proper connection at the main
control board
Run
-Verify the resistance of the senser
See Table 12
-Check whether actual temperature is
out of range
-Check whether the sensor is
connected to the control board
-Check whether the sensor is mounted
Run
at the right position
-Check whether the sensor is in the
heat isolation material
-Check whether the sensor has failed