Time Chart Of Defrosting In Heat Mode (Reverse Type); R.v. Coil Control - Mitsubishi Electric Mr.Slim MSZ09UN Service Manual

Time chart of defrosting in HEAT mode (reverse type)

<indoor unit>
set position
Horizontal vane
Indoor fan
<outdoor unit>
Compressor normal
1second
Outdoor fan
R.V. coil
(21S4)

5. R.V. coil control

Heating · · · · · ON
Cooling · · · · · OFF
Dry · · · · · · · · OFF
NOTE: The 4-way valve reverses for 5 seconds right before start-up of the compressor.
Compressor
R.V. coil
Very Low (temperature of indoor coil thermistor > 64°F)
30
seconds
MAX. Hz
OFF
30
seconds
5 seconds
ON
ON
(COOL / DRY)
5 sec.
ON
OFF
ON
OFF
horizontal
OFF
MAX. 79Hz (MSZ12UN)
MAX. 80Hz (MSZ09UN)
OFF
OFF
(HEAT)
5 sec.
29
set position
set speed
MAX. Hz
OFF
30
seconds
1second
5
seconds
ON
ON
ON
OFF
ON
OFF