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Troubleshooting
Only an authorized person can check using this method.
● Before Checking
(1) Turn ON the main power supply. Wait for more than 20 seconds to start checking.
(2) Checking Items
* Expansion Valve Opening
* Temperature Readings from Thermistors
(3) Check the locations of 7-segment and push switches.
(4) High voltage is applied to the main PCB and electrical parts. Never touch electrical parts and wires without appropriate
personal protective equipment (PPE) when checking.
4 Checking Using 7-Segment Display
You can check the operating conditions and each part of the refrigerant system temperature condition by 7-segment
display (SEG1) on the outdoor unit display PCB and push switches (PSW).
To start the checking mode: Press PSW2 for 3 seconds
To move the checking item forward: Press PSW2
To move the checking item backward: Press PSW3
To cancel the checking mode: Press PSW2 for 3 seconds
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“Checking of Protection
Control Information”
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