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11.3. During group control operation
System example
1. The main power is turned on while the transmission wires between the indoor units are not connected.
(open circuit at A or B or C)
Symptom
Operation of indoor unit No.1 and No.3 is possible.
However “check” flashes in the remote control display for 3-5 minutes after main power is turned on.
Remote control unit: “check” flashes
Error code: F30-01 (indoor capacity error)
Indoor unit: LED1 on P.C.B flashes
Outdoor unit: LED6, 7 on P.C.B flashes
2. The main power is turned on while the remote control connection wire is not connected.
(open circuit at section D)
Symptom
Nothing abnormal appears on the remote control display.
Operation of indoor unit No.1 and No.2 is possible.
However indoor unit No.3 cannot be operated.
Remedy
1. Turn off the main power.
↓
2. Connect the disconnected wire correctly.
↓
3. Turn on the main power.
↓
4. After 1 minute, start the operation using the remote control.
(Indoor unit operation will start according to the remote control setting.)
(Outdoor unit operation will start after 3-5 minutes.)
11.4. Test operation and self-diagnosis
11.4.1. Test Run (Forced Cooling mode)
1. Always use a properly-insulated tool to operate the switch on the circuit board.
(Do not use your finger or any metalic object.)
2. Never turn on the power supply unit until all installation work has been completed.
3. Turn on the circuit breaker before test operation extends past 12 hours.
4. Check that the voltage is -10% of the rated voltage (198V) or higher when starting the unit.
The unit will not operate if the voltage is less than -10% of the rated voltage (198V).
5. If test operation continue more than 30 minutes, test operation finishes and shift to normal operation.
6. Test operation mode can be selected cooling mode.
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