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5390862-UIM-A-0318
Johnson Controls Unitary Products
21
Discharge line sensor failure (open)
Control senses an open sensor
1 fault occurrence
2 RED
flashes
1
4
Soft Lockout
High discharge line temperature
Discharge Temperature > 263
°
F
RED
(solid)
1
5
Fault, None Lockout
High discharge line temperature
Discharge Temperature > 263
°
F
3 HDT fault occurrences
2 RED
flashes
1
5
Soft Lockout
High discharge line temperature
Discharge Temperature > 263
°
F
4 HDT soft lockouts within 12 hours
or a combination of 4 soft lockouts
3 RED
flashes
1
5
Hard Lockout
Low discharge line temperature
Discharge Temperature < 90
°
F
RED
(solid)
1
6
Fault, None Lockout
Low discharge line temperature
Discharge Temperature < 90
°
F
3 LDT fault occurrences
2 RED
flashes
1
6
Soft Lockout
Low discharge line temperature
Discharge Temperature < 90
°
F
4 LDT soft lockouts within 12 hours
or a combination of 4 soft lockouts
3 RED
flashes
1
6
Hard Lockout
Wiring - Configuration Related Faults
O signal received in AC mode
O signal received in AC mode
1 fault occurrence
2 RED
flashes
1
8
Soft Lockout
W signal received in AC mode
W signal received in AC mode
1 fault occurrence
2 RED
flashes
1
9
Soft Lockout
W and O signal received in AC mode
W and O signal received in AC mode
1 fault occurrence
2 RED
flashes
2
0
Soft Lockout
System previously configured as AC, now HP
No RV on configuration,
RV present on subsequent startup
1 fault occurrence
2 RED
flashes
2
5
Soft Lockout
System previously configured as HP, now AC
RV present on configuration,
No RV on subsequent startup
RED
(solid)
2
6
Fault, None Lockout
System previously configured as HP, now AC
RV present on configuration,
No RV on subsequent startup
1 fault occurrence; Cooling Mode
2 RED
flashes
2
6
Soft Lockout
Cooling Mode ONLY
Y2 present without Y1
Y2 present without Y1
1 fault occurrence
2 RED
flashes
2
7
Soft Lockout
Configuration Error
Configuration Error
Jumpers Set to 00000 without a factory
configuration, no tonnage selected, or
incorrect tonnage set.
2 RED
flashes
3
0
Soft Lockout
TABLE 6:
Fault Code
Description
Required Condition
LED
7-Segment
Display 1
7-Segment
Display 2
Control
Response