Table 14 - Ylaa Fault And Inhibit Codes; Table 15 - Legend - York YLAA0041 Manual

FORM 150.72-ICOM6
ISSUE DATE: 08/03/2022

TABLE 14 - YLAA FAULT AND INHIBIT CODES

CODE TYPE
2 Unit Fault
4
Unit Fault
27 Unit Fault
28 Unit Fault
29 Unit Fault
31 Unit Fault
5
System Fault
7 System Fault
18
System Fault
19 System Fault
23 System Fault
24 System Fault
25 System Fault
26
System Inhibit

TABLE 15 - LEGEND

TYPE
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
JOHNSON CONTROLS
FAULT OR INHIBIT DESCRIPTION
Low Ambient Temperature
Low Leaving Chilled Liquid Temperature
Pump Trip (Hydro Pumps 1 or Hydro Pumps 2)
Pump Flow Failure (Hydro Pumps 1 or Hydro Pumps 2)
High Ambient Temperature
Flow Switch Open
High Discharge Pressure (Software)
Low Suction Pressure
Motor Protector/High Pressure (Mechanical)
Low Evaporator Temperature (R407c Only - N/A Hp Heating Mode)
Low Suction Superheat (EEV)
Sensor Failure (EEV)
Discharge Inhibit (Heat Pump heating mode only)
Motor Protector/High Pressure Inhibit
DEFINITION
SECTION 7 – UNIT CONTROLS
AUTO, 1X, 3X
(SEE LEGEND)
Auto
Auto
Auto
1x
Auto
Auto
3x
3x
3x
3x
3x
1x
3x
Auto
131
7