Mitsubishi Electric PUHZ-ZRP35VKA Service Manual page 123

INITIAL SETTINGS FOR REFRIGERANT LEAKAGE DETECTION FUNCTION
14-2.
14-2-1. PAR-30MAA/PAR-31MAA
Refrigerant leakage is detected after a long time.
To enable this function, the refrigerant volume must be saved (initial learning) after installation. Always operate this function in
the following manner after installation.
• Always perform test run before using this function, and confi rm that the air conditioner operates normally.
• To accurately detect refrigerant leaks, set the wind speed to strong, and execute this operation.
* "Refrigerant leak check" is valid only with models which support the refrigerant leak check function.
1
Select "Service" from the Main menu, and press the
Select "Check" with the F1 or F2 button, and press the
Select "Refrigerant leak check" with the F1 or F2 button, and press the
button.
2
Stable mode will start.
Press the button, stable mode will start.
*Stable mode will take approx. 20 minutes.
3
The operation data will appear.
The following value is the reference for the refrigerant volume check. If the refrig-
erant is leaking, "NG" will appear.
The refrigerant volume check reference value can be changed with the func-
tion selection.
Default value RP71 – : 80%
– RP50 : 70%
<Resetting the initial learning data>
If the unit has been relocated or if refrigerant has been additionally charged, the initial learning data must be reset and learn-
ing performed again.
How to reset the data:
1. Turn the main power OFF.
2. Attach the short-circuit pin for the emergency operation connector (CN31) on the outdoor controller board to the ON side.
3. Turn ON the test run switch (SW4-1) on the outdoor controller board.
4. The data will be reset when the main power is turned ON.
5. Turn the main power OFF.
6. Turn OFF the test run switch (SW4-1).
7. Return the short-circuit pin for the emergency operation connector (CN31) to the OFF side.
* Under the following conditions, it may not be possible to carry out stable operation or accurately detect refrigerant leaks.
• When the outdoor intake temperature is 40°C or higher, or when the indoor intake temperature is 23°C or less.
• When the indoor fan speed is not set to strong.
OCH527B
button.
button.
123
Check menu
Error history
Refrigerant volume check
Refrigerant leak check
Smooth maintenance
Request code
Service menu:
Cursor
F1 F2 F3 F4
Refrigerant leak check
Start refrigerant leak check
Approx. 20minutes
Begin:
Refrigerant leak check
Add Cond Add Cond
OK OK
OK NG
OK –
–
NG
Check menu:
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