Mitsubishi Electric PUHZ-RP8YHA Technical & Service Manual page 29

(2)
(3)
5 (1)
(2)
(3)
b)
4 To cancel self-diagnosis
There are following two methods to cancel self-diagnosis:
Press the H "CHECK" button twice within three seconds.
Self-diagnosis is cancelled and the display screen will
return to the status before self-diagnosis.
Press the I "ON/OFF" button.
Self-diagnosis is cancelled and indoor unit will stop.
This operation is ineffectual when the operation of remote
controller is prohibited.
During self-diagnosis at maintenance service, all the indoor
units start performing fan operation except for the indoor
unit indicating the latest error. Then outdoor units of the
same refrigerant system also start performing fan operation
intermittently for 3 minutes. (The fan is on for 3 seconds
and then off for 5 seconds.)
The unit with error can be inspected by using this. In case
unit other than indoor unit, such as outdoor unit and con-
troller of MELANS, has an error, all the indoor units of the
same refrigerant system stop fan operation and outdoor
units operate intermittently for 3 minutes.
5 To delete error code
When something is wrong with air conditioner, error code
(P1 etc.) is memorized, but error code can be deleted after
termination of service.
<To delete error cord with remote controller>
(1) Display the error cord at the self-diagnosis result display
screen.
b) Alternating display
(2) The address for self-diagnosis will blink when the D
w button is pressed twice within three seconds.
(3) The display (3) shown on the left will be appeared when
the error cord has been reset. Note that the error content
will be redisplayed if error cord resetting is unsuccessful.
<To delete error cord with switch of outdoor unit>
Refer to "13-10. FUNCTION OF SWITCHES, CONNEC-
TORS AND JUMPERS".
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