Mitsubishi Electric MSZ-FH15NA Service Manual Page 12
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8-2. DRY ( ) OPERATION
(1) Press OPERATE/STOP (ON/OFF) button.
OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone.
(2) Select DRY mode with OPERATION SELECT button.
(3) The set temperature is determined from the initial room temperature.
1. Coil frost prevention
Coil frost prevention works the same way as that in COOL mode. (8-1.1.)
2. Low outside temperature operation
Low outside temperature operation works the same way as that in COOL mode. (8-1.2.)
8-3. FAN ( ) OPERATION
(1) OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone.
(2) Select FAN mode with OPERATION SELECT button.
(3) Select the desired fan speed. When AUTO, it becomes Low.
Only indoor fan operates.
Outdoor unit does not operate.
8-4. HEAT ( ) OPERATION
(1) Press OPERATE/STOP (ON/OFF) button.
OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone.
(2) Select HEAT mode with OPERATION SELECT button.
(3) Press TEMPERATURE buttons TEMP or button to select the desired temperature.
The setting range is 61 - 88°F (16 - 31°C).
1. Cold air prevention control
When the compressor is not operating or is starting, and the temperature of indoor heat exchanger and/or the room tem-
perature is low or when defrosting is being done, the indoor fan will stop or rotate in Very Low speed.
2. High pressure protection
The compressor operational frequency is controlled by the temperature of the indoor heat exchanger to prevent the con-
densing pressure from increasing excessively.
When the temperature of indoor heat exchanger becomes too high, the high pressure protection works.
The indoor fan operates following the cold air prevention control. This mode continues until the temperature of indoor
heat exchanger falls.
3. Defrosting
Defrosting starts when the temperature of outdoor heat exchanger becomes too low.
The compressor stops once, the indoor/outdoor fans stop, the 4-way valve reverses, and the compressor re-starts.
This mode continues until the temperature of outdoor heat exchanger rises or the fixed time passes.
8-1. COOL ( ) OPERATION
(1) Press OPERATE/STOP (ON/OFF) button.
OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone.
(2) Select COOL mode with OPERATION SELECT button.
(3) Press TEMPERATURE buttons TEMP or button to select the desired temperature.
The setting range is 61 - 88°F (16 - 31°C).
1. Coil frost prevention
The compressor operational frequency is controlled by the temperature of the indoor heat exchanger to prevent the coil
from frosting.
When the temperature of indoor heat exchanger becomes too low, the coil frost prevention mode works.
The indoor fan operates at the set speed and the compressor stops. This mode continues until the temperature of indoor
heat exchanger rises.
2. Low outside temperature operation
When the outside temperature is lower, low outside temperature operation starts, and the outdoor fan slows or stops.
OBH683
- SERVICE MANUAL 1
- MSZ-FH09NA 1
- MSZ-FH12NA 1
- MSZ-FH15NA 1
- TECHNICAL CHANGES 3
- PART NAMES AND FUNCTIONS 4
- SPECIFICATION 5
- OUTLINES AND DIMENSIONS 6
- WIRING DIAGRAM 7
- REFRIGERANT SYSTEM DIAGRAM 8
- SERVICE FUNCTIONS 9
- Indoor electronic control 10
- P.C. board 10
- MICROPROCESSOR CONTROL 11
- 8-4. HEAT ( ) OPERATION 12
- 8-1. COOL ( ) OPERATION 12
- 8-2. DRY ( ) OPERATION 12
- 8-3. FAN ( ) OPERATION 12
- 8-6. AUTO VANE OPERATION 13
- AUTO 1 2 5 SWING43 13
- Horizontal 14
- 8-7. TIMER OPERATION 15
- 75°F (24°C) 16
- 81°F (27°C) 16
- PM 9:00PM 8:00 16
- 8-10. INDIRECT/DIRECT mode 18
- 8-9. i-see CONTROL ( ) MODE 18
- Emergency 19
- (E.O. SW) 19
- TROUBLESHOOTING 20
- A Check of indoor fan motor 26
- Indoor electronic 28
- Indoor power 28
- MUZ-09/12 29
- MUZ-FH15 30
- DISASSEMBLY INSTRUCTIONS 33
- OPERATING PROCEDURE PHOTOS 34
- Holder shapeClip shape 38
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