Test Run - Mitsubishi Electric Mr.Slim PCA-M-HA Series Installation Manual

7. Test run

7.1. Before test run
► After completing installation and the wiring and piping of the indoor and
outdoor units, check for refrigerant leakage, looseness in the power supply
or control wiring, wrong polarity, and no disconnection of one phase in the
supply.
► Use a 500-volt megohmmeter to check that the resistance between the power
supply terminals and ground is at least 1.0 MΩ.
7.2. Test run
7.2.1. Using wired remote controller.
■ Make sure to read operation manual before test run. (Especially items to secure safety)
Step 1 Turn on the power.
● Remote controller: The system will go into startup mode, and the remote controller power lamp (green) and "PLEASE WAIT" will blink. While the lamp and message
are blinking, the remote controller cannot be operated. Wait until "PLEASE WAIT" is not displayed before operating the remote controller. After the power is turned on,
"PLEASE WAIT" will be displayed for approximately 3 minutes.
● Indoor controller board: LED 1 will be lit up, LED 2 will be lit up (if the address is 0) or off (if the address is not 0), and LED 3 will blink.
● Outdoor controller board: LED 1 (green) and LED 2 (red) will be lit up. (After the startup mode of the system finishes, LED 2 will be turned off.) If the outdoor controller
board uses a digital display, [- ] and [ -] will be displayed alternately every second.
If the operations do not function correctly after the procedures in step 2 and thereafter are performed, the following causes should be considered and eliminated if they
are found.
(The symptoms below occur during the test run mode. "Startup" in the table means the LED display written above.)
Remote Controller Display
Remote controller displays "PLEASE WAIT", and
en
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.
10
Symptoms in test run mode
OUTDOOR BOARD LED Display
< > indicates digital display.
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>
► Do not carry out this test on the control wiring (low voltage circuit) termi-
nals.
Warning:
Do not use the air conditioner if the insulation resistance is less than 1.0 MΩ.
Insulation resistance
• After power is turned on, "PLEASE WAIT" is displayed for 3
minutes during system startup. (Normal)
• Incorrect connection of outdoor terminal block (L, N and S
S .)
3
• Outdoor unit's protection devise connector is open.
• Incorrect wiring between the indoor and outdoor unit (Polarity
is wrong for S
, S
1
• Remote controller transmission wire short.
• There is no outdoor unit of address 0. (Address is other than 0.)
• Remote controller transmission wire open.
• After canceling function selection, operation is not possible for
about 30 seconds. (Normal)
Cause
, S .)
2 3
, S ,
1 2