Mitsubishi Electric PUHZ-SHW80VHA Service Manual page 112

3. How to start "Judgment of refrigerant leakage " mode.
To know the current condition of refrigerant amount, same operation must be performed.
Please repeat the same procedure 1~3 as when "Initial learning operation" for "Checking operation".
4Press w
CLOCK button and select the [GAS LEAK JUDGE]
Refrigerant leakage
detection
(initial teaching)
GAS LEAK
TEST START
5Press ( ) button to confirm. (Display A LOADING)
FILTER
Display C
Waiting for response
Display[C] indication
" 0 "
" 20 "
" 8888 "
<Note>
% for judgment can be changed by "Unit function setting of remote controller".
Selectable either 80%(initial setting) or 60%
Refer to "Mode No.21" on <Table 1> Function selections in ch.11-1.
(When the "%" for judgment is changed, please start "Initial learning 1~3" about 1 minute (3) and cancel 4.)
Then, please start "Judgment of refrigerant leakage" mode(1~5).
<How to reset the initial condition (data) >
When the unit is removed and installed again or refrigerant is charged additionally, the "Initial learning" must be
performed again by following procedure.
(1)Turn "Main Power" OFF.
(2)Connect the pin of CN31 to ON position on the outdoor controller board.
(3)Turn SW4-1 on the outdoor controller board to ON.
(4)Turn "Main Power" ON to reset the initial data.
After reset the data, please turn pin of CN31 and SW4-1 to original(OFF) position.
<Caution>
1.On the following condition, the operation cannot be stabillized and judgment of cheking operation may not be accurate.
(a)Outdoor temperature ] 40:or Room temperature [ 23:
(b)Air flow setting is not "High-notch".
2.Please check the operation and unit status, when the operation is not stabilized after more than 45 minutes.
OCH526C
Refrigerant leakage
detection judgment
GAS LEAK
JUDGE
Flashing
"
Loading Judgment
Meaning (% setting)
Refrigerant leakage is less than 20% of initial condition.
Refrigerant leakage is more than 20% of initial condition.
"Error"=No initial data is available.
0"