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 |
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| Yes |
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| Yes |
| No |
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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 |
|
|
|
| No |
Turn off ID | Yes | Fan on |
| ||
Blower Motor |
| >30 secs? |
|
| Yes |
| No | Lossof Call |
|
| |
|
| for ID Blower? |
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| Energize ID | |
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| Blower Motor | |
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| Yes |
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| No | Fan off | ||
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| >10 secs? | |
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| Yes |
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| No |
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| Call for | |||
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| ID Blower? | |
Call for | Yes | |
| ||
Cooling? |
| |
| No |
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| |
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|
No | Loss of Call | Yes |
|
| |
| for Cooling? |
|
First
Stage?
Yes
Call for 1st
Stage
Cooling
Cool Off
FIGURE 28 - BASIC TROUBLESHOOTING FLOWCHART
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Power to | Call for |
| Yes | Voltage @ | |||
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| ||||||
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| ||||||
Unit | heat? |
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| Gas Valve? | |||
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| No |
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| No | |
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Initialize ASCD |
|
| Energize ID |
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| Blower | |
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Montior
FIGURE 29 - POWER ON FLOW CHART
Yes
44 | Unitary Products Group |
