Panasonic 2WAY Multi Technical & Service Manual page 55

3
Is the indoor/outdoor operation wiring severed (connectors,
3-1
Remote
terminals disconnected)?
controller wires
(wires linking
3-2 Is the indoor/outdoor operation wiring short-circuited?
the remote
controller to
the water heat 3-3 Is the indoor/outdoor operation wiring grounded?
exchanger unit)
Is voltage being applied to the indoor/outdoor operational
3-4 wiring? (If no, the fuse (F001) on the outdoor unit's main
board has blown.)
Repair the wiring properly so that no electrical voltage is
3-5 applied. Is the water heat exchanger unit's control board
2P-13 already in use?
4
Outdoor unit 4-1 Has the outdoor unit broken down?
breakdown
5
Noise
5-1 Is a source of noise located nearby?
6
Water heat
exchange unit's
control board
6-1 Is AC200V ±10% being applied between R and S on TB1?
and surrounding
area
6-2 Is the varister (VA1) grounded or severely deteriorated?
6-3 Is the power switch (SW1) on?
Are suitable DC voltages being applied to CN1 (6P-1)?
(Suitable DC voltage = approximately 5V between
6-4
TP1 and 2, approximately 7V between TP3 and 4, and
approximately 5V between TP5 and 6)
IV–42
Yes Repair severed wires
No 3-2
Yes Correct the short circuit
No 3-3
Yes Correct the ground
No 3-4
Yes 3-5
No 4-1
Replace the water heat
Yes exchanger unit's control
board
Reverse the water heat
exchanger unit's control
No
board connectors (2P-12
→ 2P-13)
Yes Repair the malfunction
No 5-1
Set up noise
Yes
countermeasures
No 6-1
Proceed to 6-2 after
having confi rmed that
Yes
the wiring and terminals
are normal around TB1
Request improvements
No to the power facility
manager
Replace the varister
Yes
(VA1)
No 6-3
Proceed to 6-4 after
having confi rmed that
Yes
the wiring is normal
around SW1
No Set SW1 to ON
Yes 6-8
No 6-5