Mitsubishi PEH series, User Manual

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5
Canceling self-diagnosis
The following two methods can be used to cancel self-diagnosis.
Press the CHECK button twice within three seconds to cancel self-diagnosis.
The display screen will return to the status before self-diagnosis.
Press the
I
ON/OFF button to cancel self-diagnosis. The indoor unit will stop.
(This operation is ineffectual when operation is prohibited.)
1.4. Remote controller diagnosis
If operation cannot be carried out from the remote controller, use this function to
diagnose the remote controller.
[Fig. 1.4.1]
1
STAND BY
DEFROST INDOOR UNIT
ADDRESS NO
CLOCK
ON OFF ˚C
1Hr.
˚C
CHECK MODE
FILTER
CLOCK
FUNCTION
1
2
STAND BY
DEFROST INDOOR UNIT
ADDRESS NO
CLOCK
ON OFF ˚C
1Hr.
˚C
CHECK MODE
FILTER
CHECK
FUNCTION
ON OFF
˚C CHECK MODE
FILTER
CHECK
FUNCTION
STAND BY
DEFROST INDOOR UNIT
ADDRESS NO
CLOCK
˚C
1Hr.
3
(1)
STAND BY
DEFROST INDOOR UNIT
ADDRESS NO
CLOCK
ON OFF ˚C
1Hr.
˚C
CHECK MODE
FILTER
CHECK
FUNCTION
ON OFF
˚C
CHECK MODE
FILTER
CHECK
FUNCTION
STAND BY
DEFROST INDOOR UNIT
ADDRESS NO
CLOCK
˚C
1Hr.
(2)
STAND BY
DEFROST INDOOR UNIT
ADDRESS NO
CLOCK
ON OFF ˚C
1Hr.
˚C CHECK MODE
FILTER
CHECK
FUNCTION
L Remote controller transmission data
M Transmission data at transmission path
(2)
(1)
I Electric current marker
ON OFF
˚C CHECK MODE
FILTER
CHECK
FUNCTION
STAND BY
DEFROST INDOOR UNIT
ADDRESS NO
CLOCK
˚C
1Hr.
K
When the number
of data errors
generated is 02.
1
First, check the electricity current marker
If the correct voltage (DC 12 V) is not displayed on the remote controller, the
electric current marker will be lit.
If the electricity current marker is not lit, check the remote controller wiring and
the indoor units.
I
Electric current marker
2 Transfer to remote control mode
Hold down the CHECK button for five seconds or more to display the diagram
on the left.
Press the FILTER button to commence diagnosis of remote controller.
3
Remote controller diagnosis results
(1) The remote control is functioning correctly.
Check other possible causes as there are no problems with the remote con-
troller.
(2) The remote controller has a nonconformity.
The remote controller must be replaced.
Error display 1 (“NG”) flashes to show a nonconformity in the transmitter-re-
ceiver circuit.
Potential problems other than those diagnosed for the remote con-
troller.
(1) Single transmission not possible if error display 2 (“E3”) flashes.
There is “noise” on the transmission line, or damage of other remote control-
lers for the indoor units can be considered. Check the transmission path and
other controllers.
(2) Data error has occurred when error display three shows “ERC” and number of
data errors.
Number of generated data errors (maximum 66 errors).
The number of generated data errors stands for the difference in the number of
bits of transmitted data from the remote controller and the actual number of
bits that were transmitted along the transmission path. If this error occurs, “noise”,
etc., is interfering with the transmission data. Check the transmission path.
K
When the number of data errors generated is 02
L Remote controller transmission data
M
Transmission data at transmission path
4
Cancel the remote controller diagnosis
Hold down the CHECK button for five seconds or more to cancel the remote
controller diagnosis. The “H0” operation lamp will flash, and the display screen
will return to the status before remote controller diagnosis in approximately 30
seconds.