Mitsubishi Electric Mr.SLIM PLA-M50EA Manuel D'installation page 19

7. Test run
• If the unit cannot be operated properly after test run, refer to the following table to find the cause.
Wired remote controller
Please Wait
→
Please Wait Error code
Display messages do not appear
even when operation switch is
turned ON (operation lamp does
not light up).
On the wireless remote controller with condition above, following phenomena take place.
• No signals from the remote controller are accepted.
• Operation lamp is blinking.
• The buzzer makes a short ping sound.
Note:
Operation is not possible for about 30 seconds after cancellation of function selection. (Correct operation)
For description of each LED (LED 1, 2, 3) provided on the indoor controller, refer to page 15.
A
B
C
D
Fig. 7-6
8. System control
Refer to the outdoor unit installation manual.
Symptom
LED 1, 2 (PCB in outdoor unit)
After LED 1, 2 are lighted, LED 2 is turned
For about 3 minutes
off, then only LED 1 is lighted. (Correct
after power-on
operation)
Only LED 1 is lighted.
Subsequent to
about 3 minutes
after power-on
Only LED 1 is lighted.
twice, LED 2 blinks once.
A Water supply pump
B Water (about 1000 cc)
C Drain plug
D Pour water through outlet
•
Be careful not to spray water into
the drain pump mechanism.
• For about 3 minutes after power-on, operation of the remote
controller is not possible due to system start-up. (Correct
operation)
• Connector for the outdoor unit's protection device is not con-
nected.
→
LED 1, 2 blink.
Reverse or open phase wiring for the outdoor unit's power
terminal block (~/N: L, N) (3N~: L1, L2, L3, N)
• Incorrect wiring between indoor and outdoor units (incorrect
→
LED 1 blinks
polarity of S1, S2, S3)
• Remote controller wire short
7.4. Check of drainage (Fig. 7-6)
• Ensure that the water is being properly drained out and that no water is leaking
from joints.
When electric work is completed.
• Pour water during cooling operation of test run (refer to 7.2.) and check.
When electric work is not completed.
• Pour water during emergency operation and check.
* Drain pan and fan are activated simultaneously when single phase 220-240 V is
turned on to S1 and S2 on terminal block after the connector (SWE) on controller
board in the electrical box is set to ON.
Be sure to turn it back to the former state after work.
Cause
17
en