13-1
TROUBLESHOOTING
SM DLSDCI 3-A.1 GB
13. TROUBLESHOOTING
13.1 Precaution, Advise and Notice Items
13.1.1 High voltage in Indoor and Outdoor unit electrical assembly
§ Open the Outdoor unit controller assembly only after one minute from power off.
§ Whole controller assembly, including the wires, connected to the Outdoor unit may
have the potential hazard voltage when power is on.
§ Touching the Outdoor unit controller assembly may cause an electrical shock.
§ Do not touch the naked lead wire and don’t insert nger, conductor or anything else
into the controller when power is on.
13.1.2 Charged Capacitors
§ Large capacity electrolytic capacitors are used in the outdoor unit controller and
driver.
§ Charging voltage (380VDC) remains after power is down.
§ Discharging takes about one minute after turned off.
§ Touching the outdoor unit electrical assembly before discharging may cause an
electrical shock.
§ Measure the electrolytic capacitors voltage to be below 50VDC before further checking
electrical assembly parts.
13.1.3 Advisory Notes
§ When open the Outdoor unit electrical assembly, don’t touch the soldering pin by
hand or by any conductive material.
§ When connecting or disconnecting the connectors on the PCB, hold the whole
housing, don’t pull the wire.
WARNING!!!
ØWhen Power Up – the outdoor and indoor unit electrical assemblies, including
the wiring, are under HIGH VOLTAGE!!!
ØNever open the outdoor or indoor units before turning off ALL Power sources!!!
ØWhen turned off, the outdoor unit electrical assembly is still charged (400V)!!!
ØDC capacitors are discharging for about 3 Minute after power is OFF.
ØTouching the electrical before discharging may cause an electrical shock!!!
Ø
For safe handling of the electrical assembly please refer to section 13.1 above.
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