Lennox MWMA009S4-*L, Service Manual

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19.6.1. Test Run Instructions
You should perform the Test Run for at least 30 minutes.
1. Connect power to the unit.
2. Press the ON/OFF button on the remote controller to turn it on.
3. Press the mode button to scroll through the following functions, one at a time:
• COOL - Select lowest possible temperature.
• HEAT - Select highest possible temperature.
4. Let each function run for 5 minutes, and perform the following checks:
19.6.2. Before Test Run
Table 5. Test Run Checklist
Checks Pass Fail
No electrical leakage
Unit is properly grounded
All electrical terminals properly covered
Indoor and outdoor units are solidly installed
All pipe connection points do not leak
Water drains properly from drain hose
All piping is properly insulated
Unit performs COOL function properly
Unit performs HEAT function properly
Indoor unit louvers rotate properly
Indoor unit responds to remote controller
19.7. Double-Check Pipe Connections
During operation, the pressure of the refrigerant circuit will increase. This may reveal leaks that were not present during your
initial leak check. Take time during the Test Run to double-check that all refrigerant pipe connection points do not have leaks.
• Using remote control, return unit to the normal operating temperature.
• Using insulation tape, wrap the indoor refrigerant pipe connections that you left uncovered during the indoor unit
installation process.
19.8. Ambient Temperature is Below 63°F (17°C)
You can’t use the remote controller to turn on the COOL
function when the ambient temperature is below 17°C.
In this instance, you can use the MANUAL CONTROL
button to test the COOL function.
• Lift the front panel of the indoor unit, and raise it
until it clicks in place.
• The MANUAL CONTROL button is located on
the right-hand side of the unit. Press it 2 times to
select the COOL function.
• Perform Test Run as normal.
Manual control
button