Mitsubishi Electric M Serie Manuel D'installation page 34

If the unit cannot be operated properly after the above test run has been performed, use this table to remove the cause:
Remote controller
PLEASE WAIT
PLEASE WAIT → Error code
Display messages do not ap-
pear even when operation
switch is turned ON
(operation lamp does not
light up).
Operation is not possible for about 30 seconds after cancellation of function selection. (correct operation)
LED 1: power for microcomputer
LED 2: power for remote controller
LED 3: communication between
indoor and outdoor units
14.4. Auto restart function
Indoor unit control board
This model is equipped with the 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 unit control board.
The AUTO RESTART FUNCTION will restart the unit within a time delay of 5 to 10 minutes after power is
restored.
Set the AUTO RESTART FUNCTION using the remote controller. (Mode no. 01)
Specifications are subject to change without notice.
SVZ-KP12, 18, 24, 30, 36NA
Symptom
LED 1, 2
(PCB in outdoor
unit)
After LED 1, 2 are lit
For about 2 mi-
→
nutes
LED 2 is turned off
following
Only LED 1 is lit
power-on
(correct operation)
Only LED 1 is lit →
LED 1, 2 blink.
After about 2
minutes has
expired
following
Only LED 1 is lit →
power-on
LED 1, 2 blinks twice
LED 2 blinks once
Description of LED 1, 2, and 3 on the indoor controller
Indicates whether control power is supplied. Make sure that this LED is always lit.
Indicates whether power is supplied to the remote controller. This LED lights only in the case of
the indoor unit which is connected to the outdoor unit refrigerant address "0".
Indicates state of communication between the indoor and outdoor units. Make sure that this LED
is always blinking.
34
Cause
• For about 2 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 de-
vice is not connected.
• Reverse or open phase wiring for the outdoor
unit's power terminal block (L1, L2, L3)
• Incorrect wiring between indoor and outdoor
units (incorrect polarity of S1, S2, S3)
• Remote controller wire short
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