Mitsubishi Electric Mr.Slim PUZ-SM100VKA Service Manual page 35

9-3-3. Self-diagnosis <PAR-21MAA>
When a problem occurs to the air conditioner, the indoor and outdoor units will stop,
and the problem is shown in the remote controller display.
[CHECK] and the refrigerant address are displayed on the temperature
display, and the check code and unit number are displayed alternately as
shown below.
1. (If the outdoor unit is malfunctioning, the unit number will be "00".)
2. In the case of group control, for which one remote controller controls
multiple refrigerant systems, the refrigerant address and check code of the
unit that first experienced trouble (i.e., the unit that transmitted the check
code) will be displayed.
3. To clear the check code, press the
When using remote-/local-controller combined operation, cancel the check code after turning off remote operation.
During central control by a MELANS controller, cancel the check code by pressing the
9-3-4. Self-Diagnosis During Maintenance or Service <PAR-21MAA>
Since each unit has a function that stores check codes, the latest check code can be recalled even if it is cancelled by the re mote
controller or power is turned off.
Check the error history for each unit using the remote controller.
1. Switch to self-diagnosis mode.
H
Press the CHECK button (
The display content will change as shown below.
Unit number or refrigerant address
to be diagnosed
3. Display self-diagnosis results.
<When there is error history>
(For the definition of each check code, refer to the indoor unit's installation manual or service handbook.)
<When there is no error history>
4.
Reset the error history.
Display the error history in the diagnosis result display screen (see step
OCH708
button.
ON/OFF
(Alternating Display)
Check code (2 or 4 digits)
in the picture above) twice within 3 seconds.
(Alternating Display)
Check code (2 or 4 digits)
3
).
F
E
G
Address (3 digits) or unit number (2 digits)
2.
Set the unit number or refrigerant address you want to diagnose.
Press the [TEMP] buttons (
to select the desired number or address. The number (address) changes between
[01] and [50] or [00] and [15].
The refrigerant address will begin to blink
approximately 3 seconds after being
selected and the self-diagnosis process will begin.
Address (3 digits) or unit number (2 digits)
<When there is no corresponding unit>
35
C
D
button.
ON/OFF
and ) ( F in the picture above)
I
A
B
H