Panasonic 2WAY Multi Technical & Service Manual page 113

● 12-1
Check high pressure sensor
Compare control board display and gauge display.
Install gauge on high pressure side, and display the outdoor
Confi rm pressure main board compressor outlet pressure. Use No.0 Operation
while stopped data display (data code 11). Is the difference between
display value and gauge pressure within 0.1MPa?
Operate heater or cooler, and check the outdoor main board
Confi rm pressure compressor outlet pressure display.
while operating Is the difference between the display value and gauge
pressure within 0.1MPa?
a. Is there a DC 5V voltage between the outdoor main board
Check outdoor
connector 6P (red) CN049 No. 4 and No. 6?
main board
voltage
b. Is there a voltage equivalent to gauge pressure between
the outdoor main board connector 6P (red) CN049 No. 5 and
No. 6?
c. Wiring connection/contact poor, or wire broken, between
control board connector 6P (red) CN049 and compressor
outlet pressure sensor?
● For work procedure for replacing outdoor main board, see "5. Reference Document".
● 13-1
Check bypass Operate for several minutes, then stop with a difference in
valve compressor inlet pressure and outlet pressure, and open
the valve using outdoor main board menu item No. 04. Is the
pressure equalized?
Compressor inlet pressure(MPa)
Compressor outlet pressure(MPa)
IV–100
Yes To
No To
Pressure sensor is
Yes
normal
No To
Yes To b
Replace outdoor main
No
board
Replace outdoor main
Yes
board
No To c
Yes Repair wiring
Replace pressure
No
sensor
Yes Bypass valve is normal
Bypass valve is defective
No
(does not open)