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

© 2017 Emerson Climate Technologies, Inc.
29
AE5-1377 R3
Table 11 - System Diagnostic Information
Code
Character
1
Code
Character
2
Fault Type
Trip to Set Point
Control Board
Actions
Auto
Resets
Possible Error and Solution
0
0
Low Pressure
Cutout
Loss of Low
Pressure Control
Signal
- Stop the Unit
Auto Start
Suction Pressure below Cutout Set
Point, normal operation for pump down
system control. Unit in standby mode of
operation
1
0
No Fault
No Fault
No Action
Run
No Fault, Unit Running
1
2
Electrical
Failure
Compressor intends
to start but current
transducers on main
control board sense
no current
-Display compressor
protector trip on
diagnostic
-Auto Start When
protector resets
Auto Start
-Verify proper system voltage at the
compressor
-Verify start component operation ( if
single phase )
-Verify all phases are present, ( three
phase ) verify operation of the unit
contactor.
1
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)
-Coil Sensor fails
(open) and actual
DLT is <163°F
-Display DLT sensor
failure on diagnostic
-Continue to run the
unit on default mode
Run
-Verify proper connection at the main
control board
-Verify the resistance of the two
sensers See Table 12
1
8
Ambient
Temperature
Sensor Failure
(See Table
12)
Ambient sensor
reads < -22°F or
>145°F
-Display ambient temp
sensors failure on
diagnostic
-Continue to run the
unit on default mode.
Run
-Verify proper connection at the main
control board
-Verify the resistance of the sensor.
See Table 12
1
9
Condensor
Mid-Coil
Sensor Failure
(See Table
12)
Mid-coil sensor
reads < -22°F or
>145°F
-Display mid-coil temp
sensors failure on
diagnostic
-Continue to run the
unit on default mode.
Run
-Verify proper connection at the main
control board
-Verify the resistance of the senser
See Table 12
1
A
PHE vapor in
sensor failure
(Only in XJAL
CDU)
(See Table
12)
-Vapor in sensor
reads <3.2°F or
>163°F
-Ambient temp reads
>50°F
-Display sensor error
on diagnostics
-Continue to run unit
on default mode
Run
-Check whether actual temperature is
out of range
-Check whether the sensor is
connected to the control board
-Check whether the sensor is mounted
at the right position
-Check whether the sensor is in the
heat isolation material
-Check whether the sensor has failed