Mitsubishi Electric MUZ-HA VF Series Service Manual page 25

9-7. TIMER OPERATION (ON/OFF TIMER)
1. How to set the timer
(1) Press STOP/OPERATE/ (OFF/ON) button to start the air conditioner.
(2) Select the timer mode by pressing the
Each time this button is pressed, the timer mode is changed in sequence:
(OFF TIMER) →
(3) Set the time of the timer using the
Each time this button is pressed, the set time increase or decrease by 1 hour to 12 hours.
2. To release the timer
Press the button until
NOTE :
• The OFF TIMER and the ON TIMER cannot be set at the same time.
• The displayed time is the time remaining and will decrease in 1-hour increments as time passes.
9-8. EMERGENCY/TEST OPERATION
In the case of test run operation or the emergency operation, use the emergency operation switch in the right side of the
indoor unit. The emergency operation is available when the remote controller is missing or has failed, or when the batteries
in the remote controller are 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 MODE with a set temperature of
24°C. The fan speed shifts to Med.
The coil frost prevention works even in the test run or the emergency operation.
In the test run or the emergency operation, the horizontal vane operates in
VANE AUTO ( ) mode.
The emergency operation continues until the 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 the emergency operation switch during normal operation.
Operation mode COOL/HEAT
Set temperature
Fan speed
Horizontal vane
The operation mode is indicated by the Operation Indicator lamp as following Operation Indicator lamp
HR25/35/42/50VF
EMERGENCY COOL
EMERGENCY HEAT
STOP
Emergency operation switch
9-9. 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.
OBH822H
button during operation.
(ON TIMER) → TIMER RELEASE
button.
(OFF TIMER) and
24°C
Med.
Auto
↓
↓
(ON TIMER) are not displayed.
HR60/71VF
EMERGENCY COOL
↓
EMERGENCY HEAT
↓
STOP
Emergency operation switch
25
Lit
Not lit