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