T h e Q u a l i t y L e a d e r i n C o n d i t i o n i n g A i r
SERVICE MODE
MANUAL OPERATION
CONTROL DIAGNOSTICS
DIPSWITCH CONFIG
FAULT HISTORY
CLEAR FAULT HISTORY
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Y1 |
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Y2 |
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W | COMM | OUTPUT |
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O | COMM | OUTPUT |
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G | COMM | OUTPUT |
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H | COMM | OUTPUT |
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DH | COMM | OUTPUT |
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ECM | AIRFLOW | 0 | |||||||
PUMP | SPEED |
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TEST | MODE |
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b.Check for cool air delivery at the unit grille within a few minutes after the unit has begun to operate.
NOTE: Units have a five minute time delay in the control circuit that can be bypassed on the DXM2 control board by placing the unit in the “Test” mode as shown in the unit IOM. Check for normal air temperature drop of 15°F to 25°F (cooling mode).
c.Verify that the compressor is on and that the water temperature rise (cooling mode) is within normal range.
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d.Check the elevation and cleanliness of the condensate lines. Dripping may be a sign of a blocked line. Check that the condensate trap is filled to provide a water seal.
e.Turn thermostat to “OFF” position. A hissing noise indicates proper functioning of the reversing valve.
7.Allow five (5) minutes between tests for pressure to equalize before beginning heating test.
a.Go into Manual Mode activate Y1, and Y2 for Heating. Also manually increase CFM until desired heating CFM is achieved. Next adjust pump speed % until desired loop temperature difference (entering water temperature minus leaving water temperature) is achieved. (For modulating valve adjust valve %).
b.Check for warm air delivery at the unit grille within a few minutes after the unit has begun to operate.
NOTE: Units have a five minute time delay in the control circuit that can be bypassed on the DXM2 control board by placing
R e s i d e n t i a l S p l i t - 6 0 H z R 4 1 0 A
R e v. : 0 3 A u g u s t , 2 0 1 2
Unit Start-Up Procedure
the unit in the “Test” mode as shown in the unit IOM. Check for normal air temperature rise of 20°F to 30°F (heating mode).
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c.Verify that the compressor is on and that the water temperature fall (heating mode) is within normal range.
d.Check for vibration, noise, and water leaks.
8.If unit fails to operate properly, perform troubleshooting analysis (see troubleshooting section in the unit IOM). If the check described fails to reveal the problem and the unit still does not operate, contact a trained service technician to insure proper diagnosis and repair of the equipment.
9.When testing is complete, exit the Installer Menu and set thermostat to maintain desired comfort level for normal operation.
10.BE CERTAIN TO FILL OUT AND RETURN ALL WARRANTY REGISTRATION PAPERWORK.
Unit performance may be verified by calculating the unit heat of rejection and heat of extraction. Heat of Rejection (HR) can be calculated and compared to the performance data pages in this IOM. The formula for HR is as follows: HR = TD x GPM x 500 (or 485 for
Heat of Extraction (HE) can also be calculated and compared to the performance data pages in this IOM. The formula for HE is as follows: HE = TD x GPM x 500 (or 485 for
If performance during any mode appears abnormal, refer to the DXM2 section or troubleshooting section of this manual.
NOTE: To obtain maximum performance, the air coil should be cleaned before
WARNING!
WARNING! When the disconnect switch is closed, high voltage is present in some areas of the electrical panel. Exercise caution when working with energized equipment.
CAUTION!
CAUTION! Verify that ALL water valves are open and allow water flow prior to engaging the compressor. Freezing of the coax or water lines can permanently damage the heat pump.
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