Mitsubishi Electric EHGT17D-YM9ED Service Manual page 48

Error code Title and display conditions
E3/E5 Main remote controller communication failure
(Transmission error)
Error code E3 is displayed if the main remote
controller cannot find an empty transmission path
and thus fails to transmit for 6 seconds or the data
received by the main remote controller is different
to what was sent (by the main remote controller)
30 consecutive times.
Error code E5 is displayed if the FTC cannot find
an empty transmission path for 3 minutes and
thus cannot transmit or the data sent by the FTC
is different to what was expected 30 consecutive
times.
E6 FTC/Controller circuit board communication
failure (Reception error)
Error code E6 is displayed if after the power is
switched ON to the unit, the FTC board does not
receive any signal or the signal received is not
complete for 6 minutes, or after a period of opera-
tion the FTC board does not receive any signal or
the signal received is not complete for 3 minutes.
E7 FTC/Controller circuit board communication
failure (Transmission error)
Error code E7 is displayed if despite the FTC
board sending signal "0", signal "1" is received 30
consecutive times.
E1/E2
Main remote controller control board failure
Error code E1 displayed if main remote control-
ler cannot access it is non volatile (non power
dependent) memory.
Error code E2 is displayed when there is a fault
with the main remote controller's internal clock.
J0 FTC/wireless receiver communication failure
Error code J0 is displayed when the FTC can-
not receive data from the wireless receiver for 1
minute.
J1 to J8
Wireless remote controller/wireless receiver
communication failure
(Reception error)
Error code displayed if wireless receiver receives
no/incomplete data from the wireless remote
controller for 15 consecutive minutes.
The digit after the J refers to the address of the
wireless remote controller that has the error.
E.g. Error code "J3" refers to a communication
fault between the wireless receiver and wireless
remote control with address 3.
Note: To cancel error codes please switch system off (press button F4 (RESET) on main remote controller).
OCH722A
Possible Cause
1. 2 or more main remote controllers have
been connected to the FTC.
2. Fault with main remote controller
transmission/receiving circuit board
3. Fault with the main remote controller
circuit board
4. Electrical noise causes interference
with transmission/reception of data for
main remote controller.
1. Contact failure/short circuit/miswiring
2. Fault with controller circuit board
transmission/receiving circuit board
3. Fault with FTC transmission/receiving
circuit board
4. Electrical noise causes interference
with FTC-controller circuit board
transmission cable.
1. Fault with FTC transmission/receiving
circuit board
2. Electrical noise causes interference
with power supply.
3. Electrical noise causes interference
with FTC-controller circuit board trans-
mission cable.
1. Fault with the main remote controller
circuit board
1. Connection fault with wireless receiver-
FTC connection
2. Fault with FTC receiving circuit board
3. Fault with wireless receiver's transmis-
sion circuit board
4. Electrical noise causes interference
with wireless receiver communication
cable.
1. Battery on wireless remote control may
be flat
2. The wireless remote controller is out of
range of the wireless receiver.
3. Fault with wireless remote controller
transmission circuit board
4. Fault with wireless receiver's reception
circuit board
48
Diagnosis and action
1. Only connect 1 main remote controller to 1
FTC board.
2. to 4.
Turn the power to the unit OFF and then
ON.
If the E3/E5 code is still displayed the FTC
and/or the main remote controller circuit
board should be replaced.
* Check the LED display on the controller
circuit board (Connect the A-control service
tool, PAC-SK52ST to test.)
1. Check the connections on the FTC and
controller circuit board have not become
loose and that the connecting cable is not
damaged.
2. to 4.
Turn the power to the unit OFF and then
ON.
If the E6 code is still displayed the FTC
and/or the controller circuit board should be
replaced.
1. to 3.
Turn the power to the unit OFF and then
ON.
If the E7 code is still displayed the FTC
circuit board should be replaced.
1. Replace main remote controller circuit
board.
1. Check the connections to the wireless re-
ceiver and FTC have not become loose and
that the connecting cable is not damaged.
2. to 4.
Turn the power to the unit OFF and then
ON.
If the J0 code is still displayed the FTC and/
or the wireless receiver circuit board should
be replaced.
1 Check and replace the battery if necessary
the wireless remote controller battery.
2. to 4.
Reposition the wireless remote control
closer to the receiver and perform a
communication test.
For procedure refer to wireless remote
controller installation manual.
If "OK" is displayed then the cause of the
J1 to J8 error was the controller was out of
range of the receiver.
The wireless remote controller should be
installed within range of the receiver.
If "Err" is displayed replace wireless remote
controller with a new controller and perform
the pairing procedure.
If after this procedure the "Err" code is still
displayed the fault is with the receiver unit
(attached to the FTC).
The receiver unit should be replaced with a
new part and the original remote control can
be reconnected.
If "OK" is displayed then the fault is with the
remote control and this should be replaced.