Mitsubishi Electric PKFY-WL04NLMU-E.TH Technical & Service Manual page 48

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 replacing.
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 (in-
cluding lines). Nothing will appear on the remote controller display if the
correct voltage (8.5–12 VDC) is not supplied to the remote controller. If
this is the case, check the remote controller wiring and indoor units.
TCH122
Self check
Remote controller check
Service menu: MENU
B e
MENU
Remote controller check results screen
Exit
48
Diagnosis
Cursor
F1 F2 F3 F4
ON
SELECT
MENU RETURN
OFF
HOLD
Remote controller check
Start checking?
g n i : SELECT
F1 F2 F3 F4
ON
SELECT
RETURN
OFF
HOLD
Remote controller check
OK
: SELECT