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[ IX Troubleshooting ]
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HWE09080 GB
In case of ME 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 (4) 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 different
heat source units are grouped
6. The power of the heat source unit to be confirmed
has been cut off.
(5) Check the power supply of the heat source unit
which is coupled with the unit to be confirmed.
7. The power of the heat source unit to be confirmed
has been cut off.
(6) Check that the transmission line for centralized
control (TB7) of the heat source unit is not discon-
nected.
8. When the indoor units connected to different heat
source units are grouped without MELANS, the male
power supply connector is not connected to the fe-
male power supply switch connector (CN40) for the
transmission 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 heat
source units are connected to the female power sup-
ply 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