Smart Set Operation; Emergency/Test Operation; 3-Minute Time Delay Operation; Changing Temperature Indication - Mitsubishi Electric MSZ-GE09NA Service Manual

8-9. SMART SET ( ) OPERATION (MSZ-GE06/09/12/15/18NA MSY-09/12/15/18NA)
1. How to SET SMART SET operation
(1) Press OPERATE/STOP (ON/OFF) button.
(2) Select COOL, HEAT (MSZ) or ECONO COOL mode.
(3) Press SMART SET button.
(4) Set the temperature, fan speed, and airfl ow direction for SMART SET operation.
NOTE: • SMART SET operation cannot be selected during DRY or AUTO mode operation.
• The setting range of HEAT mode in SMART SET operation is between 50°F (10°C) and 61 - 87°F (16 - 31°C)
(MSZ).
• 2 settings can be saved. (One for COOL/ECONO COOL, one for HEAT) (MSZ).
• 1 setting can be saved. (MSY).
2. How to cancel operation
• Press SMART SET button again.
• SMART SET operation can also be cancelled by pressing OPERATION SELECT button to change the operation mode.
The same setting will be selected from the next time by simply pressing SMART SET button.

8-10. EMERGENCY/TEST OPERATION

In the case of test run operation or emergency operation, use EMERGENCY OPERATION switch on the right side of the
indoor unit. Emergency operation is available when the remote
controller is missing, has failed, or when the batteries in the remote
controller running down. The unit will start and OPERATION
INDICATOR lamp will light up.
The first 30 minutes of operation is the test run operation. This
operation is for servicing. The indoor fan runs at High speed and
the temperature control does not work.
After 30 minutes of test run operation, the system shifts to
EMERGENCY COOL/HEAT(MSZ) MODE with a set temperature of
75°F (24°C). The fan speed shifts to Med.
All protective operations such as the coil frost prevention works
even in the test run or emergency operation.
In the test run or emergency operation, the horizontal vane oper-
ates in VANE AUTO ( ) mode.
Emergency operation continues until EMERGENCY OPERATION
switch is pressed once or twice or the unit receives any signal from
the remote controller. In the latter case normal operation will start.
NOTE: Do not press EMERGENCY OPERATION switch during
normal operation.

8-11. 3-MINUTE TIME DELAY OPERATION

When the system turns OFF, compressor will not restart for 3 minutes as 3-minute time delay function operates to protect
compressor from overload.
8-12. Changing temperature indication (°F/°C)
• The preset unit is °F.
• °F → °C: Press RESET button while the temperature
buttons are pressed.
• °C → °F: Press RESET button or remove the batteries .
OBH548D
Operation mode
Set temperature
Fan speed
Horizontal vane
The operation mode is indicated by the Operation
Indicator lamp as following
MSZ
EMERGENCY
COOL
EMERGENCY
HEAT
STOP
Press RESET button gently using
a thin instrument.
20
COOL HEAT (MSZ)
75°F(24°C) 75°F(24°C)
Med. Med.
Auto Auto
MSY
EMERGENCY
COOL
↓
STOP
↓
Lighted
Not lighted
↓