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11

Troubleshooting

WARNING!

ELECTRICAL SHOCK HAZARD! Never attempt to repair the indoor or outdoor unit yourself. System repairs must be
performed by a licensed, professional technician, or equivalent.

If any of the following conditions exist, immediately turn the system (indoor and outdoor units) off at the unit disconnect
switch and call a licensed professional technician, or equivalent, for repairs

There is a very loud sound during unit operation.

There is a terrible odor coming from the indoor unit during operation.

Water is leaking into the room.

The circuit breaker trips frequently.

Water or some other liquid has been splashed into the indoor unit.

If none of the above conditions exist, check the following items before calling for repairs. This can save you both time
and money.

Problem

Possible Cause

Unit does not operate immediately when restarted.

Unit control initiates a 3-minute delay at the end of each cycle to protect
the compressor from damage.

A whoosh or gurgling noise can be heard at the indoor unit.

Sometimes, the refrigerant can be heard in the indoor coil when the
outdoor unit starts or stops operation. This is not a malfunction.

Mist is coming out of the indoor unit during cooling operation.

This sometimes happens when the indoor temperature and humidity are
very high and the air is being cooled quickly. The mist will disappear as
the indoor temperature and humidity are lowered.

A creaking or popping noise can be heard when the unit starts or stops.

The plastic components of the indoor units sometimes expand and con­
tract when they are heated and cooled.

Unit is not operating.

Are the TIMER ON and TIMER OFF features being used incorrectly?

Is power disconnected or has circuit breaker tripped.

Is power shut down?

System is not cooling (or heating) efficiently.

Is temperature setting correct?

Are either the air inlet or air outlet blocked on the outdoor or indoor unit?

Is filter dirty?

Is fan at low speed?

Are windows and doors properly shut?

Wireless remote is not working.

Is remote in direct line of sight with indoor unit infrared receiver? Has
the remote been damaged?

Remove remote control batteries for 30 seconds, then reinsert them.
Replace batteries, if necessary.

Water is leaking from indoor unit.

Indoor humidity level is very high and water is being blown from indoor
coil. This will stop as humidity level is reduced.

Water is leaking from condensate line at Water is leaking from conden­
sate line at indoor unit.indoor unit.

Check condensate line outside to make sure it is not obstructed.

Check condensate line to make sure it has not been disconnected from
indoor unit.

Water is leaking from the outdoor unit.

During operation in high-humidity areas, condensate will form on cold
outdoor refrigerant pipes.

When heat pump is operating in defrost mode, ice will thaw from around
outdoor coil and water will flow from the unit.

Clicking noise heard inside.

Sometimes, the sound of the outdoor unit fan or compressor relay can
be transmitted in a way that makes it seem to be coming from the indoor
unit.

Indoor fan is not working.

Heat pump units -- In HEAT mode, a timed delay keeps indoor fan off
for two minutes to prevent unheated air from being circulated by the
indoor fan.

Heat pump units -- In HEAT mode, cold outdoor temperatures and high
humidity cause frost to accumulate on the outdoor unit. When this hap­
pens, the unit will enter a defrost cycle. The indoor fan is off during the 3
- 12 minute cycle.

In DEHUMIDIFICATION mode, indoor fan operation may be stopped to
avoid delivery of moist air to the room. Do not adjust temperature set­
ting.

Содержание MS8 SERIES

Страница 1: ...is manual is the property of the homeowner and must be left with the user 2012 Lennox Industries Inc Dallas Texas USA MS8 Single Zone Mini Split System Air Conditioners and Heat Pumps 507022 01 10 201...

Страница 2: ...essional service technician or equivalent must annually inspect this system This unit must be properly grounded Do not use this system if any part has been underwater A flood dam aged appliance is ext...

Страница 3: ...Tape e p i p n o i t c e n n o C Air inlet Typical indoor unit shown Actual unit may be slightly different Front Panel Display Air outlet Filter Directional Louver Wireless remote control Temperature...

Страница 4: ...ixed in a downward position In climates with very low winter temperatures it may be necessary to supplement heating by addi tional means space heater fireplace etc In heating mode the operating range...

Страница 5: ...r unlock the remote control buttons When the remote control is locked the icon is displayed AUTO COOL DEHUMIDIFICATION FAN HEAT FAN button Press this button to select fan speed AUTO fan is the default...

Страница 6: ...button and use and buttons to set time for sys tem shutdown When desired time is displayed press TIMER OFF button again Press SLEEP button to cancel sleep function In cooling mode SLEEP function incre...

Страница 7: ...ver NOTE Actual louver position is different than what is shown on remote icon See comparison to the right Press the LOUVER SETTING button once to activate the full range oscillation mode from top to...

Страница 8: ...uver Press once to activate full range oscillation Press more than once to scroll through and select one of five fixed positions or one of three other oscillating positions If function is activated wh...

Страница 9: ...thin its receiving range to ensure proper system control Control should be kept at least 3 feet 914mm away from other electrical appliances televisions stereos etc to prevent signal interference If re...

Страница 10: ...ts on top of unit or around unit that may be obstructing air flow Check to make sure that indoor unit and wall bracket are secure and have not been damaged Use a clean dry cloth to gently remove dust...

Страница 11: ...nected or has circuit breaker tripped Is power shut down System is not cooling or heating efficiently Is temperature setting correct Are either the air inlet or air outlet blocked on the outdoor or in...

Страница 12: ...stem an error code will replace the temperature setting displayed on the front cover of the indoor unit If more than one error has occurred the codes will alternate so that all codes are shown Make no...

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