TABLE 38: UNIT CONTROL BOARD FLASH CODES
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| GREEN | RED | RED | RED | RED | |
FLASH CODE | DESCRIPTION | LED | LED | LED | LED | LED | |
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| 16 | 8 | 4 | 2 | 1 | |
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On Steady | This is a Control Failure | - | - | - | - | - | |
1 Flash | Not Applicable | - | - | - | - | - | |
2 Flashes | Control waiting ASCD* | Flashing | Off | Off | On | Off | |
3 Flashes | HPS1 Compressor Lockout | Off | Off | Off | On | On | |
4 Flashes | HPS2 Compressor Lockout | Off | Off | On | Off | Off | |
5 Flashes | LPS1 Compressor Lockout | Off | Off | On | Off | On | |
6 Flashes | LPS2 Compressor Lockout | Off | Off | On | On | Off | |
7 Flashes | FS1 Compressor Lockout | Off | Off | On | On | On | |
8 Flashes | FS2 Compressor Lockout | Off | On | Off | Off | Off | |
9 Flashes | Ignition Control Locked Out / Ignition Control Failure | Off | On | Off | Off | On | |
10 Flashes | Compressors Locked Out on Low Outdoor Air Temperature1 | Flashing | On | Off | On | Off | |
11 Flashes | Compressors locked out because the Economizer is using free | Flashing | On | Off | On | On | |
Cooling1 | |||||||
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12 Flashes | Unit Locked Out due to Fan Overload Switch Failure | Off | On | On | Off | Off | |
13 Flashes | Compressor Held Off due to Low Voltage1 | Flashing | On | On | Off | On | |
14 Flashes | EEPROM Storage Failure | Off | On | On | On | Off | |
OFF | No Power or Control Failure | Off | Off | Off | Off | Off |
*. Non-alarm condition.
Check
Alarm
History
Reset All
ASCDs for
One Cycle
Non Alarm
Condition Green
LED Flashing
Current Alarm
Flashed
Red LED
FIGURE 24: UNIT CONTROL BOARD
40 | Unitary Products Group |