5390862-UIM-A-0318
20 Johnson Controls Unitary Products
TABLE 5:
Status Code Display & Timing
Duration of
connection (seconds)
Control behavior with no thermostat signals present
Control behavior with thermostat signals present
1
< 2 Display Operational Mode (AC or HP) (5 sec) Display PWM sent to the ODF (5 sec)
2-6
Display Current/Stored Fault Code(s) if present Bypass ASCD (Reduce timer to zero immediately).
Note: If a fault condition is active, the control will
continue to display the active fault. It will not display
stored faults until the active fault is cleared.
If Y1 is present and high-pressure switch is closed,
contactors will be energized.
Clear soft lockout Clear soft lockout; Except Fault Codes 25, 26, and 30.
Clear hard lockout Clear hard lockout; Except Fault Codes 25, 26, and 30.
> 6
Set Tonnage Configuration (5 sec), ONLY if the
Tonnage Configuration Error fault is currently active.
Will not initiate a defrost cycle in an A/C application.
Set Operational Mode (AC or HP) (5 sec), ONLY if
the AC/HP Mode fault is currently active.
Note: If either of the previous 2 actions were taken, the
following will not occur on the same PUSH BUTTON
press.
Clear Fault Code Array, if faults are present
Clear soft lockout Clear soft lockout; Except Fault Codes 25, 26, and 30.
Clear hard lockout Clear hard lockout; Except Fault Codes 25, 26, and 30.
Pushbutton signal removed Resume normal LED display Resume normal LED display
Pushbutton signal not removed
Display will toggle between Operational Mode (AC/HP)
(5 sec) and Tonnage Configuration (5 sec)
Resume normal LED display
1. If the PUSH BUTTON is pressed during two-stage anticipation mode, with an active thermostat call. The control will remove the forced second stage.
TABLE 6:
Fault Code
Description Required Condition LED
7-Segment
Display 1
7-Segment
Display 2
Control
Response
Control Fault
Control Failure Control Failure Detected
RED
(solid)
0 0 Failure
Operational Faults
High-pressure switch fault (not in lockout yet) HPS Opening
RED
(solid)
0 1 Fault, None Lockout
System in high-pressure switch lockout
HPS Openings
2 HPS faults within 6 hours
2 RED
flashes
0 2 Soft Lockout
System in high-pressure switch lockout
HPS Openings
4 HPS soft lockouts within 12 hours
or a combination of 4 soft lockouts
3 RED
flashes
0 2 Hard Lockout
Low-pressure switch lockout
LPS open > 5 seconds
1 fault occurrence
2 RED
flashes
0 4 Soft Lockout
Low-pressure switch lockout
LPS open > 5 seconds
4 LPS soft lockouts within 12 hours
or a combination of 4 soft lockouts
3 RED
flashes
0 4 Hard Lockout
Cooling LTCO Active Call for cooling below 35°F
RED
(solid)
0 5 Fault, None Lockout
Low Voltage (<19.2VAC) preventing further
relay outputs for > 2 seconds
Further calls for relay outputs
prevented based on low voltage
RED
(solid)
0 6 Fault, None Lockout
Low Voltage (<16 VAC) stopped
current relay outputs for > 2 seconds
Relay outputs stopped
based on low voltage
RED
(solid)
0 7 Fault, None Lockout
Required Sensor or Switch Faults
Outdoor ambient sensor failure (short) Control senses a shorted sensor
RED
(solid)
09
Fault None Lockout;
ODF will operate at
units Max PWM.
Outdoor ambient sensor failure (open) Control senses an open sensor
RED
(solid)
10
Fault None Lockout;
ODF will operate at
units Max PWM.
Discharge line sensor failure (short)
Control senses a shorted sensor
1 fault occurrence
2 RED
flashes
1 3 Soft Lockout
Continued on next page.
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