Mitsubishi Electric MSZ-A09NA Series Service Manual page 48

11-9. EMERGENCY/TEST OPERATION
In case of test run operation or emergency operation, use EMERGENCY OPERATION switch on the front of the indoor
unit. Emergency operation is available when the remote controller is missing, has failed or the batteries of the remote
controller run down. The unit will start and OPERATION INDICATOR lamp will light.
The first 30 minutes of operation is the test run operation. This operation is for servicing. The Indoor fan speed runs at
High speed and the system is in continuous operation (with thermostat ON).
After 30 minutes of test run operation the system shifts to EMERGENCY COOL/HEAT MODE with a set temperature of 75°F.
The fan speed shifts to Med.
All protective operations such as the coil frost prevention works even in emergency operation.
In the test run or emergency operation, the horizontal vane operates in VANE AUTO (
Emergency operation continues until EMERGENCY OPERATION switch is pressed once or twice or the unit receives any
signal from the remote controller. In case of latter normal operation will start.
NOTE: Do not press EMERGENCY OPERATION switch during normal operation.
EMERGENCY OPERATION switch
11-10. Changing temperature indication (°F/°C)
MSZ-A•NA- MSY-A•NA-
1
The preset unit is °F.
Press RESET button while
the temperature buttons
are pressed.
© Copyright 2006 MITSUBISHI ELECTRIC CO.,LTD
Distributed in Mar. 2009. No. OB450 REVISED EDITION-D 4
Distributed in Jun. 2008. No. OB450 REVISED EDITION-C 6
Distributed in May 2007. No. OB450 REVISED EDITION-B 7
Distributed in Dec. 2006. No. OB450 REVISED EDITION-A 7
Distributed in Apr. 2006. No. OB450 7
Made in Japan
MSZ-GA MSY-GA
1
Press RESET button gently
using a thin stick.
HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN
Operation mode
Set temperature
Fan speed
Horizontal vane
E.O.
SW
The operation mode is indicated by the Operation
Indicator lamp as following
MSZ type
EMERGENCY
COOL
EMERGENCY
HEAT
STOP
New publication, effective Mar. 2009
Specifications subject to change without notice.
) mode.
COOL HEAT (MSZ)
75°F 75°F
Med. Med.
Auto Auto
MSY type
EMERGENCY
COOL
STOP
Lighted
Not lighted