YMGI VRFI-07EW-D2B(55)5, Installer'S Instruction & User'S Manual

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Following checks prior to contacting an authorized service center may save you time and costs.
Phenomenon Normal or Abnormal
The unit doesn't deliver cooling or heating, immediately after
the unit is restarted (remote control or power resuming). If the unit is powered off, and then restored, it will not run the compressor
until 3 minutes later. This is normal 3-minutes restarting protection due to
high internal refrigerant pressure.
The unit emits a smell. For a new unit, some of the odor is normal.
For any bad or abnormal odor, shut off the unit and check the unit and the
area around the unit for anything visible that could cause the odor. May
need to call your technician.
Hearing the sound of "water flow" inside the unit.
Normally this is due to refrigerant flowing through the coils.
Mist is blowing out of the unit. Normally this happens during cooling startup period, when the indoor air is
hot and humid.
Hearing creaking noise during unit starting or shutting off. Normally this is caused by the expansion or contraction of
components due to temperature changes.
The unit doesn't operate at all.
1) Is power shut off or lost?
2) Is the TIMER set up?
3) Is the circuit breaker engaged, or tripped?
4) Is the fuse connected, or blown?
5) Is the voltage too high or low?
6) Is the flow control or other switches breaking the circuit?
7) Is the unit under the 3-minute restarting protection period?
8) Does the remote control have power?
Unit doesn't respond to remote control. 1) Dose the remote control have battery power?
2) Is the remote control pointing at sunshine or bright lights?
3) Is the remote control signal blocked?
4) Is the remote control too far away from indoor unit?
5) Is the fuse on indoor unit blown?
6) Is the indoor unit powered on?
7) Is the indoor unit transformer good?
8) Is the indoor unit control board good?
Cooling (heating) is weak. 1) Is the set temperature too high or too low?
2) Is the filter dirty?
3) Is the air vent blocked?
4) Is the unit undersized?
5) Is there a window or door opened?
6) Is the unit refrigerant at a lower level?
7) Is the outdoor temperature too hot or cold?
8) Is fan speed set at a low speed?
Indoor unit doesn't blow air. 1) Is the unit in 3-minutes restarting protection period?
2) In heating mode, the indoor fan motor will not rotate before the indoor
coil is hot enough. This is a normal anti-cold air blowing function.
3) Is the outdoor unit defrosting?
4) Is the unit in fan-pausing period for dehumidification mode?
5) Is the filter dirty?
6) Is the fan motor setting screw loose?
7) Is the fan capacitor bad?
8) Is the fan motor bad?
Condensate forms at air discharge louver. This is normal when the conditioned cool air is mixed with the warm/hot
and humid indoor air. Condensate may go away gradually once the indoor
air is dehumidified and cooled down.
Water drips out of the indoor unit. 1. Is indoor air too warm and humid?
2. Is the condensate drain hose/connection leaking?
3. Is the condensate drain hose clogged or restricted?
4. Is the condensate drain hose insulated?
5. Is the 3" hole at exterior wall staffed or sealed?
Phenomenon Normal or Abnormal
Noise is heard at the indoor unit. 1. Is the fan motor or compressor relay energized?
2. Is it due to temperature change that causes part expansion or
contraction?