JOHNSON CONTROLS
120
FORM 155.32-ICOM1.EN.GB
ISSUE DATE: 10/13/2017
SECTION 6 – OPERATION
Alarm Codes
The following table contains the alarm codes for the
controller, the name of the failure that triggered the
alarm, the cause of the alarm, and the action needed to
correct the problem. The codes are the same for both
mechanisms covered in this document
TABLE 32 -
ALARM CODES
ALARM CODE
FAILURE NAME
CAUSE
CORRECTIVE ACTION
AL01
PV input failure (over-
range)
Sensor burnout
Incorrect wiring
Incorrect PV input type
setting
Check the wiring
Set the PV input type again
AL02
PV input failure (under-
range)
AL03
Cold Junction (CJ)
failure
Terminal temperature is
faulty (thermocouple)
Check the ambient temperature
PV input failure RTD 1
Sensor burnout
Incorrect wiring
Check the wiring
AL05
RSP input failure (over-
range) (Displayed in
RSP mode) 2
Sensor burnout
Incorrect wiring
Incorrect RSP input type
setting
Check the wiring
Set the RSP input type again.
AL06
RSP input failure
(under-range)
(Displayed in RSP
mode)
AL07
Motor Feed Back (MFB)
input failure
Burnout
Incorrect wiring
Check the wiring
Check the MFB input valve
AL10
Motor adjustment failure
Burnout
Incorrect wiring
Power for motor is shut
down
Check the wiring
Adjust the motor after checking power for the
motor.
AL11
CT input failure (Over-
range) (CT input 1,2, or
both) 2
A current exceeding the
upper limit of the display
range was measured.
The number of CT turns or
the number of CT power
wire loops is incorrectly
set. Or, the wiring is
incorrect.
Use a CT with the correct number of turns for
the display range
Reset the number of CT turns
Reset the number of CT power wire loops
Check the wiring
AL70
Analog to Digital (A/D)
conversion failure
A/D converter is faulty
Replace the unit
AL95
Parameter failure
Power is shut down while
the data is being set
Data is corrupted by noise
Restart the unit
Set the data again (set data for AL95/97 and
adjustment data for AL96/98)
Replace the unit
AL96
Adjustment data failure
AL97
Parameter failure (RAM
area)
Data is corrupted by noise
AL98
Adjustment data failure
(RAM area)
AL99
ROM failure
ROM (memory) is faulty
Reset the unit
Replace the unit
1. RTD: Resistance Temperature Detector
2. CT: Current Transformer
