Panasonic 2WAY Multi - Page 52

IV–39
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Troubleshooting
1
Power supply
1-1 Is/was the outdoor unit power OFF?
Yes
Turn the power on and
wait 3 minutes
No 2-1
2
Setting
switches
2-1
Is the terminating resistance switch (SW010) on the
outdoor unit’s main board set at [SHORT]?
Yes 2-2
No Correct to [SHORT]
2-2 Is the number of indoor units set at two?
Yes 2-3
No Set [2 units]
2-3
Do the system addresses for the water heat exchanger
unit and outdoor unit match up?
Yes 3 -1
No
Make sure the water
heat exchanger SW14
and the outdoor unit
setting match up
3
Indoor/outdoor
operation wiring
3-1
Is the indoor/outdoor operation wiring severed (connectors,
terminals disconnected)?
Yes Repair severed wires
No 3-2
3-2 Is the indoor/outdoor operation wiring short-circuited?
Yes Correct the short circuit
No 3-3
3-3 Is the indoor/outdoor operation wiring grounded?
Yes Correct the ground
No 3-4
3-4
Is the connection for the water heat exchanger unit
electrical box’s indoor/outdoor operation wiring located
between the terminal boards TB5-1 and 2?
Yes 3 - 5
No Repair
3-5
Is electrical voltage being applied to the indoor/outdoor
operation wiring? (If no, the fuse (F1) on the outdoor unit’s
main board has blown.)
Yes 3 - 6
No 4-1
3-6
Repair the wiring properly so that no electrical voltage is
applied. Is the outdoor unit’s main board CN046 already in
use?
Yes
Replace the outdoor
unit’s main board
No
Reverse the connectors
on the outdoor unit’s
main board (CN045 →
CN046)
4
Outdoor unit
breakdown
4-1 Has the outdoor unit broken down?
Yes Repair the malfunction
No 5-1
5
Noise
5-1 Is a source of noise located nearby the outdoor unit?
Yes
Set up noise
countermeasures
No
Replace the outdoor
unit’s main board
● See “5. Reference Document” for details on the procedure for replacing the water heat exchanger unit’s
control board.
● For board and Electrical Wiring Diagram, see Chapter 6.
• Outdoor main board: page VI-2
• Outdoor power board: page VI-3
• Converter board: VI-4
• Indoor control board for DC motor models: page VI-5
• Outdoor Unit Electrical Wiring Diagram: page VI-6
GHPtroubleshooting.indbIV‒39GHPtroubleshooting.indbIV‒39 2012/11/2611:20:092012/11/2611:20:09