Basic Troubleshooting Flowchart; Unit Control Board Flash Codes - York PREDATOR DM090 Installation Manual

TABLE 37: UNIT CONTROL BOARD FLASH CODES
Flash Code
On Steady
Heart Beat
1 Flash
2 Flashes
3 Flashes
4 Flashes
5 Flashes
6 Flashes
7 Flashes
8 Flashes
9 Flashes
10 Flashes
11 Flashes
12 Flashes
13 Flashes
14 Flashes
OFF
*.
These flash codes do not represent alarms.
Monitor
FIGURE 24 - BASIC TROUBLESHOOTING FLOWCHART
40
Control Failure - Replace Control
Normal Operation
Not Applicable
*
Control waiting ASCD
HPS1 - Compressor Lock out
HPS2 - Compressor Lock out
LPS1 - Compressor Lock out
LPS2 - Compressor Lock out
FS1 - Compressor Lock out
FS2 - Compressor Lock out
Ignition Control Locked Out/
Ignition Control Failure / Limit Switch Trip / No Jumper Plug in Heat Section
Compressors Locked Out On Low
*
Outdoor Air Temperature
Compressors Locked Out Because The
Economizer Is Using Free Cooling
Fan Overload Switch Trip - Not Applicable On This Unit *
Compressor Held Off Due To Low Voltage*
EEPROM Storage Failure (Control Failure)
No Power or Control Failure
Monitored
No No
Systems Programming?
Problem?
Yes Yes
Program
Unit
Trip/Failure
Control
Board
No
Yes
Turn off ID Fan on
Blower Motor >30 secs?
Yes
No
Lossof Call
for ID Blower?
Description
*
No Loss of
Call for
Call for
Heating?
Heating?
Yes
No
Call for
Heat
Energize ID Call for
Blower Motor Cooling?
No
Yes
No
Fan off
>10 secs?
Yes
No
No
Call for Loss of Call
ID Blower? for Cooling?
035-17311-003-A-0704
Yes
Heat Off
Call for 2nd
Stage
Cooling
No
Yes
First
Stage?
Yes
Call for 1st
Stage
Cooling
Yes
Cool Off
Unitary Products Group