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FAULT/STATUS CODE OUTDOOR SYSTEM TROUBLE SHOOTING
TABLE 7: Outdoor Control Faults/Status Code Display
Outdoor Control Description
Control Fault
Outdoor Control Failure
Operational Faults
High-pressure switch fault (not in lockout yet)
System in high-pressure switch lockout (last
mode of operation was normal compressor)
System in high-pressure switch lockout (last
mode of operation was normal compressor)
System in high-pressure switch lockout (last
mode of operation was defrost)
System in high-pressure switch lockout (last
mode of operation was defrost)
Low Voltage (<19 VAC)
Inverter Control Communications Fault
JCI RS-485 Communications Lost
Repair part tonnage selection does not match
the stored value programmed in the JCI factory
Inverter Model Number installed does not
match the stored tonnage in EEPROM
Required Sensor or Switch Faults
Outdoor ambient sensor failure (short)
Outdoor ambient sensor failure (open)
Coil sensor failure (short) not in lockout yet
Coil sensor failure (short)
Coil sensor failure (open) not in lockout yet
Coil sensor failure (open)
Liquid line temperature sensor failure (short)
not in lockout yet
Liquid line temperature sensor failure (short)
Liquid line temperature sensor failure (open)
not in lockout yet
Liquid line temperature sensor failure (open)
Discharge temperature sensor failure (short)
Discharge temperature sensor failure (open)
not in lockout yet
Discharge temperature sensor failure (open)
Suction temperature sensor failure (short) not
in lockout yet
Suction temperature sensor failure (short)
Suction temperature sensor failure (open) not
in lockout yet
Continued on next page.
Johnson Controls Unitary Products
1
Outdoor Display Text
LED
RED
CONTROL FAILURE
(solid)
RED
HPS - OPEN
(solid)
RED
HPS SOFT LOCKOUT - NORMAL
(solid)
RED
HPS HARD LOCKOUT - NORMAL
(solid)
RED
HPS SOFT LOCKOUT - DEFROST
(solid)
RED
HPS HARD LOCKOUT - DEFROST
(solid)
RED
LOW VOLTAGE – BELOW 19VAC
(solid)
RED
COMMUNICATIONS LOST -
(solid)
INVERTER DRIVE
RED
COMMUNICATIONS LOST –
(solid)
SYSTEM MASTER
RED
INVERTER CONFIGURATION ERROR
(solid)
RED
INVERTER MODEL INSTALLATION
(solid)
ERROR – HARD LOCKOUT
RED
OUTDOOR AMBIENT SENSOR -
(solid)
SHORT – SOFT LOCKOUT
RED
OUTDOOR AMBIENT SENSOR –
(solid)
OPEN – SOFT LOCKOUT
RED
COIL TEMP SENSOR - SHORT
(solid)
RED
COIL TEMP SENSOR -
(solid)
SHORT – SOFT LOCKOUT
RED
COIL TEMP SENSOR - OPEN
(solid)
RED
COIL TEMP SENSOR -
(solid)
OPEN – SOFT LOCKOUT
RED
LIQUID TEMP SENSOR -
(solid)
SHORT
RED
LIQUID TEMP SENSOR -
(solid)
SHORT – SOFT LOCKOUT
RED
LIQUID TEMP SENSOR - OPEN
(solid)
RED
LIQUID TEMP SENSOR -
(solid)
OPEN – SOFT LOCKOUT
RED
DISCHARGE TEMP SENSOR -
(solid)
SHORT
RED
DISCHARGE TEMP SENSOR - OPEN
(solid)
RED
DISCHARGE TEMP SENSOR –
(solid)
OPEN – SOFT LOCKOUT
RED
SUCTION TEMP SENSOR - SHORT
(solid)
RED
SUCTION TEMP SENSOR –
(solid)
SHORT – SOFT LOCKOUT
RED
SUCTION TEMP SENSOR – OPEN
(solid)
5284792-UIM-A-0317
Left Triangle
Right Triangle
Indication
Indication
(Outdoor Screen)
(Outdoor Screen)
–
–
–
X
–
X
–
X
–
X
–
X
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
X
–
X
–
X
–
X
–
X
–
X
–
X
–
X
–
X
–
X
–
X
X
–
X
–
X
–
13
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