Service manual

29
11-2. CHECK POINT UNDER TEST RUN
(MA remote controller)
(1) Before test run
• After installation of indoor and outdoor units, piping work and electric wiring work, re-check that there is no refrigerant leak-
age, loosened connections and incorrect polarity.
• Measure impedance between the ground and the power supply terminal block(L, N) on the outdoor unit by 500V Merger and
check that it is 1.0M" or over.
wDon’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.
• Make sure that all of the SW5 switches for function changes on the control board of the outdoor unit are set to OFF. If all of
the SW5 switches are not set to OFF, record the settings and then set all of the switches to OFF. And perform emergency
operation. After finishing emergency operation, set the SW5 switches to the recorded settings.
• Turn on power supply twelve hours before test run in order to protect compressor.
• For specific 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.)
PAR-20MAA
ON/OFF
CENTRALLY CONTROLLED
ERROR CODE
CLOCK
ON OFF
˚C
CHECK
CHECK MODE
FILTER
TEST RUN
FUNCTION
˚C
1Hr.
NOT AVAILABLE
STAND BY
DEFROST
FILTER
CHECK TEST
TEMP.
TIMER SET
TEST RUN button
TEST RUN display
LIQUID PIPE TEMPERATURE display
11-2-1. Test run by remote controller
• 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.
w1 After turning on the power supply, the system will go into startup mode, “H0” will blink on the display section of the room
temperature, and lamp(red) of the remote controller will flash.
As to INDOOR BOARD LED, LED1 and LED2 will 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 finishes,
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 w1 written above.
Remote Controller Display
Symptoms in test run mode
OUTDOOR BOARD LED Display
Cause
Remote controller displays “H0”, and
cannot be operated.
After power is turned on, “H0” 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, “H0” is displayed for 2 minutes during
system startup. (Normal)
• Incorrect connection of outdoor terminal block (L, N 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 short.
• There is no outdoor unit of address 0.
(Address is other than 0.)
• Remote controller transmission wire burnout.
• 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, F4, 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.
2. Press TEST RUN button twice.
1. Turn on the main power supply.
3. Press OPERATION SWITCH
button.
4. Press AIR DIRECTION button.
5. Check the outdoor unit fan for
correct running.
6. Press the ON/OFF button to reset the test run in progress.
7. Turn off the main power supply.
While the room temperature display on the remote
controller is “H0”, the remote controller is disabled.
Wait until “H0” disappears before using remote controller.
“H0” appears for about 2 minutes after power supply is
turned on. w1
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
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