L16 Faulty Water Heat Exchanger Unit Settings - Panasonic 2WAY Multi Technical & Service Manual

L16 Faulty Water Heat Exchanger Unit Settings

* Only detected when the water heat exchanger unit is connected.
Re-check the settings if it is not the relevant model.
Error detection method
An error is determined in accordance with the criteria shown below the fi rst time the settings on the water heat
exchanger unit's control board are incorrect.
• When the temperature during heating with SW4 and 5 is outside of the temperature setting.
• When the temperature during cooling (water) with SW1 to 3 is outside of the temperature setting.
• When the temperature during cooling (brine) with SW1 to 3 is outside of the temperature setting.
• When the setting for the anti-icing control switch with SW8-1 is incorrect.
Troubleshooting
1
Set temperature
Are the settings for SW4 and SW5 between 35°C and
check during 1-1
55°C?
heating
2
2-1 Is it used as a water chiller?
Set temperature
check during
cooling (water)
2-2 Is SW1-2 set at OFF?
2-3 Is SW1-3 set at OFF?
Are the settings for SW2 and SW3 between 5°C and 15°C?
2-4 (If the answer is "No" for either 2-2 or 2-3, diagnostics will
end even if 2-4 is "Yes.")
3
Set temperature
3-1 Is SW1-2 set at ON?
check during
cooling (brine)
Are the settings for SW1, SW2 and SW3 between -15°C
3-2 and 15°C? (If the answer is "No" for 3-1, diagnostics will
end even if 3-2 is "Yes.")
4
4-1 Is SW8-1 set at OFF?
Anti-icing
control switch
setting check
4-2 Is SW8-1 set at ON?
5 Momentarily reverse (switch to the opposite sides) all dip
Miscellaneous switches (SW1-2. SW1-3, SW1-8) and then try returning
5-1
them to their previous positions. Has the problem been
solved?
Move the position of the rotary switches (SW2 to 5) around
5-2 at random, and then try returning them to within the set
range. Has the problem been solved?
● For details on the procedures for replacing the water heat exchanger unit's control board, see Chapter 5
"Reference Document."
● For details on board and electrical wiring diagrams, see Chapter 6.
● 1-1
Set SW4 at tens place and SW5 at ones place. The set temperature range is between +35°C and +55°C.
(Example: If SW2 is set at "4" and SW3 at "5", the set temperature is "+45°C".)
IV–77
Yes 2-1
No Revise settings
Yes 2-2
No 3-1
Yes 2-3
Proceed to 2-3 after
No
changing to OFF
Yes 2-4
Proceed to 2-4 after
No
changing to OFF
Yes 4-1
No Revise settings
Yes 2-2
Proceed to 2-2 after
No
changing to ON
Yes 4-2
No Revise settings
OK 5-1
NG Change to OFF
OK 5-1
NG Change to ON
Yes End diagnostics
No 5-2
Yes End diagnostics
Replace the control
No
board