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
26
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
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