JOHNSON CONTROLS
131
SECTION 7 – UNIT CONTROLS
FORM 150.72-ICOM6
ISSUE DATE: 08/03/2022
7
CODE
TYPE
FAULT OR INHIBIT DESCRIPTION
AUTO, 1X, 3X
(SEE LEGEND)
2
Unit Fault
Low Ambient Temperature
Auto
4
Unit Fault
Low Leaving Chilled Liquid Temperature
Auto
27
Unit Fault
Pump Trip (Hydro Pumps 1 or Hydro Pumps 2)
Auto
28
Unit Fault
Pump Flow Failure (Hydro Pumps 1 or Hydro Pumps 2)
1x
29
Unit Fault
High Ambient Temperature
Auto
31
Unit Fault
Flow Switch Open
Auto
5
System Fault
High Discharge Pressure (Software)
3x
7
System Fault
Low Suction Pressure
3x
18
System Fault
Motor Protector/High Pressure (Mechanical)
3x
19
System Fault
Low Evaporator Temperature (R407c Only - N/A Hp Heating Mode)
3x
23
System Fault
Low Suction Superheat (EEV)
3x
24
System Fault
Sensor Failure (EEV)
1x
25
System Fault
Discharge Inhibit (Heat Pump heating mode only)
3x
26
System Inhibit
Motor Protector/High Pressure Inhibit
Auto
TABLE 14 -
YLAA FAULT AND INHIBIT CODES
TYPE
DEFINITION
3X
Automatically restarts on the first and second fault with a lockout on the third fault in 90 minutes
1X
Locks out on the first fault
AUTO
Allows restart once meeting the required conditions
TABLE 15 -
LEGEND
