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[ IX Troubleshooting ]
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HWE0803A GB
In case of M-NET remote controller
4. Phenomena
"88" appears on the remote controller when the address is registered or confirmed.
(1) Cause, check method and remedy
Cause Check method and remedy
An error occurs when the address is registered or con-
firmed. (common)
1. A wrong address is set to the unit to be coupled. (1) Confirm the address of unit to be coupled.
2. The transmission line of the unit to be coupled is dis-
connected or is not connected.
(2) Check the connection of transmission line.
3. Circuit board failure of the unit to be coupled (3) Check voltage of the terminal block for transmission
line of the unit to be coupled.
1) Normal if voltage is between DC17 and 30V.
4. Improper transmission line work 2) Check (5) in case other than 1).
Generates at interlocking registration between LOSS-
NAY and the indoor unit
5. The power of LOSSNAY is OFF. (4) Check for the main power of LOSSNAY.
Generates at confirmation of controllers used in the
system in which the indoor units connected to differ-
ent outdoor units are grouped
6. The power of the outdoor unit to be confirmed has
been cut off.
(5) Check the power supply of the outdoor unit which is
coupled with the unit to be confirmed.
7. Transmission line is disconnected from the terminal
block for central control system connection (TB7) on
the outdoor unit.
(6) Check that the transmission line for centralized
control (TB7) of the outdoor unit is not disconnect-
ed.
8. When the indoor units connected to different outdoor
units are grouped without MELANS, the male power
supply connector is not connected to the female
power supply switch connector (CN40) for the trans-
mission line for centralized control.
(7) Check voltage of the transmission line for central-
ized control.
9. The male power supply connectors on 2 or more out-
door units are connected to the female power supply
switch connector (CN40) for the transmission line for
centralized control.
1) Normal when voltage is between 10V and 30V
10. In the system to which MELANS is connected, the
male power supply connector is connected to the fe-
male power supply switch connector (CN40) for the
transmission line for centralized control.
2) Check 8 - 11 described on the left in case other than
1).
11. Short circuit of the transmission line for centralized
control