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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

Lennox MPB036S4M Service Manual

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