L21 Gas Type Setting Failure - Panasonic 2WAY Multi Technical & Service Manual

L21 Gas Type Setting Failure

Error detection method
A Gas Type Setting Failure is assumed on the fi rst occurrence of a mismatch between the gas type setting on the
outdoor main board and the fuel change switch setting.
However, a mismatch is not detected after the gas type is confi rmed.
* The factory default gas type setting and fuel change switch setting are both "13A." Note: To use E-grade
propane as the fuel gas (G-gas compatible model), the fuel fl ow control value and gas type need to be set.
● Setting the fuel regulating valve
* Leave the power breaker to the outdoor unit OFF.
1. Set the P/N switch lever attached to the engine mixer to
the position shown in the illustration.
Rotate it 180-degrees clockwise (up until the stopper.)Do
not apply excessive force to rotate it further than this.
2. Attach the short-circuit connector supplied to the N/P
switch CN013 on the outdoor unit's control board.
* Switch the outdoor unit's power breaker to ON.
3. Attach the <Gas type> label and <Gas type setting and
adjustment completed> label inside the electrical box to
the prescribed PL NAME position.
Troubleshooting
1 Does the gas type setting match the supplied gas type
Gas 1-1 classifi cation?
typesetting Control board menu 10 (initial settings) gas type setting
Fuel change
Disconnect outdoor main board connector 3P (red) CN013
switch
connector and measure conduction of the N/P change
confi rmation switch.
1-2
(Measure between 3P red No.1 and No.3).
Gas type 0 : Conduction
Gas type 1-5 : No conduction
Disconnect N/P change confi rmation switch relay connector
2P-13 (white), and measure conduction of the switch.
1-3 (Measure between 2P white No.1 and No.2).
Gas type 0 : Conduction
Gas type 1-5 : No conduction
Correct the wiring between the outdoor main board connector 3P (red) CN013 and N/P
change confi rmation switch.
1-4
Gas type 0 : Broken wire or poor connection/contact
Gas type 1-5 : Short-circuit or pinched wire
● For work procedure for replacing outdoor main board, see "5. Reference Document".
Propane
IV–80
Lever
Yes 1-2
No Change settings
Replace outdoor main
Yes
board
No 1-3
Yes 1-4
Replace N/P change
No
confi rmation switch