Technical Information
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. MAINTENANCE
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.1 PRECAUTIONS BEFORE MAINTENANCE
1. Make sure to leave 20 minutes AFTER power has been shutdown to work on the outdoor unit. High-
capacity electrolytic capacitors on the mainboard MUST reduce voltage to safely perform maintenance.
Touching the electrolytic capacitors under 20 minutes after power cut-off WILL cause severe electric shock. If
maintenance is needed, follow the steps below to safely discharge built-up electricity after power-off.
2. As shown above, connect the plug of discharge resistance (about 100ohm, 20W). If there is no discharge
resistance, you can use the plug of soldering iron to points A and B of electrolytic capacitor. There will be
sparks when touching points A and B. Press down on them forcibly for 30 seconds to discharge electricity
of electrolytic capacitor.
3. After discharging electricity, measure the voltage between points A and B with universal meter to make
sure electricity discharging is complete in order to avoid electric shock. If the voltage between the two
points is below 20V, you can perform maintenance safely.
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discharge resistance or
plug of soldering iron