E04 Indoor Unit Receive Failure From Outdoor Unit - Panasonic 2WAY Multi Technical & Service Manual

E04 Indoor Unit Receive Failure from Outdoor Unit

1) When the indoor unit is connected
Error detection method
After turning power ON, with no transmission from outdoor unit for 3 minutes. Or, an error is determined
when the outdoor unit does not respond.
• Outdoor unit power is OFF.
• With link wiring, when outdoor main board terminal resistor switch (S7) is set to "ON" for several units.
• When turning power ON after completing auto-addressing, when the number of indoor units has changed.
• When indoor unit power is not ON.
• Inspection pin (CN062/CN071) or TEST pin (CN064) on the indoor control board is short-circuited.
• Non-volatile memory (EEPROM) is not inserted when changing indoor board.
• In the remote controller detailed settings mode, the indoor address is "undetermined".
• Indoor unit addresses duplicated
• Indoor/outdoor operation wiring is short-circuited or broken.
• Error in the reception circuit on the signal output board (option board)
• Breakdown of outdoor unit
• High voltage (AC200V, etc) applied across indoor/outdoor operation wire circuit
Troubleshooting
1
Power
1-1 Is/was the outdoor unit power OFF?
supply
1-2 Is the indoor unit power OFF?
2
Indoor/outdoor operation wiring broken or short-circuited?
2-1
Indoor/
(See "5. Reference Document")
outdoor
With link wiring, is the outdoor main board terminal resistor
operation
2-2
switch (S010) set to "ON" for several units?
wiring
High voltage (AC200V, etc) applied across indoor/outdoor
2-3
operation wire circuit?
3
Did the number of indoor units increase or decrease after
3-1
Indoor unit
auto-addressing?
count
3-2 Perform pre-check before auto-addressing. (See "5. Reference Document")
In the remote controller detailed settings mode, check the
3-3 indoor unit address (item code 13). Any undetermined (99) or
duplicated addresses for indoor units?
4
Is the inspection pin (CN062/CN071) or TEST pin (CN064) on
4-1
Indoor
the indoor control board short-circuited?
control
Is an option board (CN060) or wireless remote controller
board
4-2
(CN041) connected to the indoor control board?
Does E04 disappear several minutes after disconnecting said
connector on the indoor control board? (When controlling with
4-3
two remote controllers and the wireless remote controller is
the main, set the other remote controller as the main).
4-4 Replace the removed option board or wireless remote controller operating unit, wiring and all.
4-5 Is the LED (D002) blinking on the indoor control board?
Nonvolatile memory (EEPROM) on the outdoor main unit is not inserted, is incorrectly
4-6 inserted or is defective → Correct or replace nonvolatile memory and program it in the remote
controller properties setting mode.
Is E4 displayed on all remote controllers for other indoor units
4-7
connected to this outdoor unit?
IV–37
Turn power ON and wait
Yes
3 minutes
No 1-2
Yes Turn power ON
No 2-1
Yes Repair wiring
No 2-2
Yes Set only one unit to "ON"
No 2-3
Yes 3-2
No 3-1
Yes 3-2
No 3-3
Yes 3-2
No 4-1
Yes Eliminate short-circuit
No 4-2
Yes 4-3
No 4-5
Yes 4-4
No 4-5
Yes 4-6
No 4-7
Replace outdoor main
Yes
board
Replace indoor control
No
board