32
GB
13. Failure judgement
Check point
Measures
1
Is the DipSW set?
Turn on SW6-10, and then enable SW4 (974). (See the Dipswitch setting
section.)
Is the connector inserted into CN510?
Insert the connector to CN510.
Is the unit in the Thermo-OFF mode? (Is
the compressor operating?)
Open a window or other ventilating openings, and operate the unit in the
Heating operation.
Has either of the electric current fuses
between the terminal block and the
connector been blown?
Check for blown fuses. If any metal piece comes into contact with the
terminal block, remove it. Correct the wiring if there is a wiring error.
Is the heater wiring connected to the
correct pole of the terminal block?
Connect each wiring to the pole of the terminal block that has the same color
and number.
Isn’t the wire broken?
Check the resistance value of each heater (2880 Ω).
If the wire is broken, replace the panel heater with a new one.
2
Is the heater wiring connected to the
correct pole of the terminal block?
Connect each wiring to the pole of the terminal block that has the same color
and number.
Isn’t the wire broken?
Check the resistance value of each heater (2880 Ω).
If the wire is broken, replace the panel heater with a new one.
Isn’t the sheet metal of the heater
exposed to abnormally high-temperature
source other than heaters (such as direct
sunlight in midsummer or a burner)?
The heater stops operation for safety purpose when the temperature of the
sheet metal becomes too high. Change the conditions of this surface to the
same conditions as for other surfaces.
Do structural components move when the
heater is removed and swung widely?
The heating element may have been displaced. To prevent empty heating,
replace the heater with a new one.
3
Is the unit installed in an environment
where it is exposed to outside wind?
If so, to improve the efficiency of the heater, take measures such as
attaching a snow hood or wind protection wall.
Is the unit installed in an environment
where it is exposed to snow and where
snow can accumulate on the unit?
It is difficult to melt accumulated snow. Attach a snow hood or snow wall.
Operation check
Check that the unit is in the Heating operation,
TH7 ≤ 4°C, and the compressor is in operation.
Check that the heaters are energized (by checking
the surface temperature or the electric current).
None of the heaters is energized.
The heater does not seem to be effectively
operated. (When ice is formed on the entire top
surface of the panel heater)
Check that the unit is in the Heating operation,
TH7 ≤ 4°C, and the compressor is in operation.
Check that the heaters are energized (by checking
the surface temperature or the electric current).
All the heaters are energized.
Check the item
1
.
Check the item
2
.
Check the item
1
.
Check the item
2
.
Check the item
3
.
Yes
No
No
Yes
Some are true.
WT09190X01.book 32 ページ ２０１８年１１月２９日 木曜日 午前８時５９分
