Test Run - Mitsubishi Electric MCFH-A24WV Installation Manual

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TEST RUN

• Before performing the test run, recheck for any wrong wiring.
Wrong wiring prevents normal operation or results in blown fuse disabling operation.
• The test run can be initiated by using EMERGENCY OPERATION switch (press button switch). The EMER-
GENCY OPERATION switch is pressed, the unit will start the test run (continuous operation) for 30 minutes
in COOL MODE or HEAT MODE, depending on which mode is selected. During this 30 minutes a thermostat
does not work. After 30 minutes the unit will start the EMERGENCY OPERATION at fixed temperature
setting of 24°C in COOL MODE or HEAT MODE.
• Perform test run in the following procedure.
PROCEDURE
• Press the EMERGENCY OPERATION switch.
1 Press it once, and the EMERGENCY COOL
MODE starts.
If the left side lamp of the operation indicator blinks
every 0.5 seconds, inspect the in/out connecting wire
B for mis-wiring.
2 Press it once more, and the EMERGENCY HEAT
MODE starts.
3 Press it once more, and the operation stops.
(The operation mode changes in order of 1 - 3
every press of the EMERGENCY OPERATION
switch.)
Checking the remote (infrared) signal reception
Press the ON/OFF button on the remote control and check that an electronic sound is heard from the indoor
unit. Press the ON/OFF button again to turn the air conditioner off.
If the indoor unit is operated with the remote control, both the trial and emergency operations are released
by commands from the remote control.
• Once the compressor stops, the restart preventive device operates so the compressor will not operate for 3
minutes to protect the air conditioner.
EMERGENCY OPERATION switch
Operation indicator
Mode
lamp
1 COOL
(Light) (Off)
HEAT
2
(Off) (Light)
3 STOP
(Lights not turn on)
6-6 AUTO RESTART FUNCTION
When the indoor unit is controlled with the remote controller, the operation mode, set temperature, and the fan
speed are memorized by the indoor electronic control P.C. board. The auto restart function sets to work the
moment the power has restored after power failure, then, the unit will restart automatically. If the unit is operated
in "I FEEL CONTROL" mode before power failure, the operation is not memorized. In
"I FEEL CONTROL" mode, the operation is decided by the initial room temperature at (re)start.
Notes:
• The operation settings are memorized when 10 seconds have passed after the remote controller was oper-
ated.
• If the main power is turned off or a power failure occurs while AUTO START/STOP timer is active, the timer
setting is cancelled. As this model is equipped with the auto restart function, the air conditioner should start
operating at the same time that a power has restored.
• If the unit has been off with the remote controller before power failure, the auto restart function does not work
as the power button of the remote controller is off.
• To prevent breaker off due to the rush of starting current, systematize other home appliance not to turn on at
the same time.
6-7 EXPLANATION TO THE CUSTOMER
• Using the instruction manual, explain the following to the customer how to control temperature, how to re-
move the air filters, how to remove or put the remote controller in the remote controller holder, how to clean,
precautions, etc.
• Recommend the customer to carefully read the Operating Instruction Book.
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