� 16 �
How to check the existing piping settings
You can check whether the existing piping settings are enabled.
1. Check that the LED displays are placed in their initial status. If not, place them in the initial status.
2. Hold down SW01 for at least 5 seconds, and check that D804 flashes slowly. (Fig. 9)
3. Press SW01 four times to set the LED displays (D800 to D805) to the “LED displays for existing piping settings”
shown below. If the setting is enabled, D802 lights and D804 and D805 flash rapidly. (Fig. 10)
4. Hold down SW01 and SW02 simultaneously for at least 5 seconds to return the LED displays to the initial
status.
(Fig.9) (Fig.10)
LED displays indicated when step 3 is taken
LED displays for existing piping settings
D800
D801
D802
D803
D804
D805
D800
D801
D802
D803
D804
D805
: ON, : OFF,
: Slow flashing
: ON, : OFF,
: Rapid flashing
When restoring the factory defaults
To restore the factory defaults in situations such as when relocating the units, follow the steps below.
1. Check that the LED displays are placed in their initial status. If not, place them in the initial status.
2. Hold down SW01 for at least 5 seconds, and check that D804 flashes slowly. (Fig. 11)
3. Press SW01 14 times to set the LED displays (D800 to D805) to the “LED displays restored to factory defaults”
shown below. (Fig. 12)
(Fig.11) (Fig.12)
LED displays indicated when step 2 is taken
LED displays restored to factory defaults
D800
D801
D802
D803
D804
D805
D800
D801
D802
D803
D804
D805
: ON, : OFF,
: Slow flashing
: ON, : OFF,
: Rapid flashing
4. Hold down SW02 for at least 5 seconds, and check that D804 flashes slowly. (Fig. 13)
5. Hold down SW01 and SW02 simultaneously for at least 5 seconds to return the LED displays to the initial status.
(Fig.13)
LED displays indicated when step 4 is taken
D800
D801
D802
D803
D804
D805
: ON, : OFF,
: Slow flashing
EN
31-EN
32-EN
Existing piping
The following settings are required when using a pipe Ø3/4" (19.1 mm) as the existing piping at the gas pipe side.
Steps taken to support existing piping
1. Set the circuit breaker to the ON position to turn on the power.
2. Check that the LED displays are placed in their initial status. If not, place them in the initial status.
3. Hold down SW01 for at least 5 seconds, and check that D804 flashes slowly. (Fig. 5)
4. Press SW01 four times to set the LED displays (D800 to D805) to the “LED displays for existing piping settings”
shown below. (Fig. 6)
(Fig.5) (Fig.6)
LED displays indicated when step 3 is taken
LED displays for existing piping settings
D800
D801
D802
D803
D804
D805
D800
D801
D802
D803
D804
D805
: ON, : OFF,
: Slow flashing
: ON, : OFF,
: Rapid flashing
5. Press SW02 to set D805 to rapid flashing. (Each time SW02 is pressed, D805 is switched between rapid
flashing and OFF.) (Fig. 7)
6. Hold down SW02 for at least 5 seconds, and check that D804 flashes slowly and that D805 lights. (Fig. 8)
(Fig.7)
(Fig.8)
LED displays indicated when step 5 is taken
LED displays indicated when step 6 is taken
D800
D801
D802
D803
D804
D805
D800
D801
D802
D803
D804
D805
: ON, : OFF,
: Rapid flashing
: ON, : OFF,
: Slow flashing
7. Hold down SW01 and SW02 simultaneously for at least 5 seconds to return the LED displays to the initial status.
The existing piping is now supported by taking the above steps. In this status, the heating capacity may
decrease during heating depending on the outside air temperature and indoor temperature.
* If there is any reason to doubt whether establishing support was successful in the course of this operation, hold
down SW01 and SW02 simultaneously for at least 5 seconds to return to the initial status, and then repeat the
setting steps.
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