Mitsubishi MA Series User Manual

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• In case of test run, the OFF timer will be activated, and the test run will automatically stop after two hours.
• The room temperature display section shows the pipe temperature of indoor units during the test run.
• Check that all the indoor units are running properly in case of simultaneous twin and triple operation. Malfunctions may not
be displayed regardless of incorrect wiring.
1 After turning on the power supply, the system will go into startup mode, "PLEASE WAIT" will blink on the display section of
the room temperature, and lamp(green) of the remote controller will blink.
As to INDOOR BOARD LED, LED1 will be lit up, LED2 will either be lit up in case the address is 0 or turned off in case the
address is not 0. LED3 will blink.
As to OUTDOOR BOARD LED, LED1(green) and LED2(red) will light up. (After the startup mode of the system fi nishes,
LED2(red) will be turned off.)
In case OUTDOOR BOARD LED is digital display, [- ] and [ -] will be displayed alternately every second.
• If one of the above operations doesn't function correctly, the causes written below should be considered. Find causes from the
symptoms.
The below symptoms are under test run mode. startup in the table means the display status of
1 written above.
[TEST] button
Pipe (liquid) temperature
Displays the remaining
test run time.
"TEST RUN" and the currently selected
operation mode are displayed altemately.
2. Press TEST button twice.
1. Turn on the main power supply.
3. Press OPERATION MODE
button.
4. Press AIR DIRECTION button.
5. Check the outdoor unit's fan is
rotating.
6. Press the ON/OFF button to reset the test run in progress.
7. Register the contact number.(Refer to V.4.3.3.)
While the room temperature display on the remote
controller is “PLEASE WAIT”, the remote controller is disabled.
Wait until “PLEASE WAIT” disappears before using remote controller.
“PLEASE WAIT” appears for about 2 minutes after power
supply is turned on. 1
The outdoor unit features automatic capacity control to
provide optimum fan speeds. Therefore, the fan keeps
running at a low speed to meet the current outside air
condition unless it exceeds its available maximum power.
Then, in actuality, the fan may stop or run in the reverse
direction depending on the outside air, but this does not
mean malfunction.
Check for correct motion of auto-vanes.
Cooling mode:
Check if cool air blows and water is drained.
Heating mode: Check if warm air blows. (It takes a little
while until warm air blows.)
The TEST RUN appears on the screen.
Operating procedures
VII. Test Run by the Remote Controller (for Mr. SLIM P Series)
1. Check Points Under Test Run
Before test run
• After installation of indoor and outdoor units, piping work and electric wiring work, re-check that there is no refrigerant leakage,
loosened connections and incorrect polarity.
• Measure impedance between the ground and the power supply terminal block(L1, L2) on the outdoor unit by 500V Merger and
check that it is 1.0M
or over.
Don't use 500V Merger to indoor/outdoor connecting wire terminal block(S1, S2, S3) and remote controller terminal block (1, 2).
This may cause malfunction.
• Make sure that test run switch (SW4) is set to OFF before turning on power supply.
• Turn on power supply twelve hours before test run in order to protect compressor.
• For specifi c models which requires higher ceiling settings or auto-recovery feature from power failure, make proper changes of
settings referring to the description of Selection of Functions through Remote Controller.
Make sure to read operation manual before test run. (Especially items to secure safety.)
2.Test Run using the Wired Remote Controller
Remote Controller Display
Symptoms in test run mode
OUTDOOR BOARD LED Display
Cause
Remote controller displays “PLEASE
WAIT”, and
cannot be operated.
After power is turned on, “PLEASE WAIT”
is displayed for 3 minutes, then error code
is displayed.
No display appears even when remote
controller operation switch is turned on.
(Operation lamp does not light up.)
Display appears but soon disappears
even when remote controller is operated.
• After power is turned on, “PLEASE WAIT” is displayed for 2
minutes during
system startup. (Normal)
• Incorrect connection of outdoor terminal block (L1, L2, and
S1, S2, S3.)
• Outdoor unit’s safeguard installation connector is open.
• Incorrect wiring between the indoor and outdoor unit (Polarity
is wrong for S1, S2, S3.)
• Remote controller transmission wire is short circuit.
• There is no outdoor unit of address 0.
(Address is other than 0.)
• Remote controller transmission wire is open-circuit.
• After canceling function selection, operation is not possible for
about 30 seconds. (Normal)
After “startup” is displayed, only
green lights up. <00>
After “startup” is displayed,
green(once) and red(once) blink
alternately. <F1>
After “startup” is displayed,
green(once) and red(twice) blink
alternately. <F3, F5, F9>
After “startup” is displayed,
green(twice) and red(once) blink
alternately. <EA. Eb>
After “startup” is displayed, only
green lights up. <00>
After “startup” is displayed, only
green lights up. <00>
< > indicates digital display.

Mitsubishi MA Series Specifications

General

Brand	Mitsubishi
Model	MA Series
Category	Remote Control
Language	English