Mitsubishi Electric CITY MULTI PKFY-WL18NKMU-E Technical & Service Manual page 45

11-8. REMOTE CONTROLLER CHECK
If operations cannot be completed with the remote controller, diagnose the remote controller with this function.
1. Select "Service" from the Main menu, and
press the [SELECT/HOLD] button.
Select "Check" from the Service menu,
and press the [SELECT/HOLD] button.
Select "Diagnosis" from the Check menu,
and press the [SELECT/HOLD] button.
Select "Remote controller check" with the F1 or F2 button,
and press the [SELECT/HOLD] button.
2. Select "Remote controller check" from the Diagnosis menu, and press the [SELECT/HOLD]
button to start the remote controller check and see the check results.
To cancel the remote controller check and exit the "Remote controller check"
menu screen, press the [MENU] or the [RETURN] button.
The remote controller will not reboot itself.
3.
OK: No problems are found with the remote controller. Check other parts
for problems.
E3, 6832: There is noise on the transmission line, or the indoor unit or another
remote controller is faulty. Check the transmission line and the other
remote controllers.
NG (ALL0, ALL1): Send-receive circuit fault. The remote controller needs replac-
ing.
ERC: The number of data errors is the discrepancy between the number of bits
in the data transmitted from the remote controller and that of the data
that was actually transmitted over the transmission line. If data errors are
found, check the transmission line for external noise interference.
If the [SELECT/HOLD] button is pressed after the remote controller check results
are displayed, remote controller check will end, and the remote controller will au-
tomatically reboot itself.
Check the remote controller display and see if anything is displayed
(including lines). Nothing will appear on the remote controller display if
the correct voltage (8.5–12 VDC) is not supplied to the remote control-
ler. If this is the case, check the remote controller wiring and indoor
units.
TCH121
45
Diagnosis
Self check
Remote controller check
Service menu: MENU
Cursor
F1 F2 F3 F4
ON
SELECT
MENU RETURN
OFF
HOLD
Remote controller check
Start checking?
B e g n i : SELECT
F1 F2 F3 F4
ON
SELECT
MENU RETURN
OFF
HOLD
Remote controller check results screen
Remote controller check
OK
: SELECT
Exit