Daikin SkyAir RZQ200 · 250C7Y1B Service Manual

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Contents

Daikin SkyAir RZQ200 · 250C7Y1B Service Manual Manual pdf 109 page image

Procedure of Self-Diagnosis by LED SiBE26-70198 Troubleshooting3. Procedure of Self-Diagnosis by LED3.1 Troubleshooting by LED on Outdoor Unit PC BoardThe following diagnosis can be conducted by turning on the power switch and checking the LEDindication on the printed circuit board of the outdoor unit.4 : LED on 3 : LED off 5 : LED blinks — : Not used for diagnosisNotes: 1. Turn off the power switch, and turn it on again after 5 seconds or more. Check the errorcondition, and diagnose the problem.2. Turn off the power switch. After 5 seconds or more, disconnect the connection wire (3). Thenturn on the power switch. If the HAP on the outdoor unit PC board flashes after about 10seconds, the indoor unit PC board is faulty.3. Also check for open phase.* The error detection monitor continues to indication the previously generated error until thepower switch is turned off.Be sure to turn off the power switch after inspection.Precautions during inverter servicing1. Do not touch the energized part because of its high voltage for at least 10 minutes after thepower is turned OFF.2. After opening the switch box cover, measure the voltage between the terminals on thepower terminal block with a tester to confirm that the power is turned OFF.Take measurements at the following spots with a tester to confirm that the main circuitcapacitor voltage is 50 VDC or less.3. For the purpose of preventing damage to PC board, never fail to touch the earth terminal ofthe electrical equipment box with a hand immediately before plugging or unplugging theconnectors to release static electricity from your body.4. Before starting operation, disconnect the relay connectors X1A and X2A from the motor forthe outdoor unit fan. Be careful not to touch the energized part when disconnecting the relayconnectors. (When the outdoor unit fan is rotated by strong wind or other reasons, electricalenergy is stored in the main circuit capacitor and there may be a risk of electric shock.)5. After finishing servicing, plug the outdoor unit fan relay connector to the previous positions.Error code "E7" is displayed on the remote controller and normal operation is impossible.For connecting the connectors, refer to the "Electrical Wiring Diagram" plate attached to theback side of the switch box cover.General precautions during servicingPrecautions during refrigerant refilling(1) Use charge hoses and gauge manifolds designed for R-410A from the perspective ofresistance to pressure and prevention of impurities (SUNISO oil, etc.) from entering.(2) Be sure to blow nitrogen while brazing.When connecting the flare, apply ether or ester oil on the flare.(3) Air tightness test must be conducted at 4.0 MPa.(4) Be sure to vacuum and dry refrigerant and refrigerant charging must be carried out from theliquid side in the form of liquid.Precautions when handling the outdoor PC boardEven when not energized, touch a grounded metal part with fingers before touching any part orpattern in order to discharge electricity charged in your body.Microcomputer innormal operation Error detectionDescriptionHAP H2P(Green) (Red)5 3 Normal4 — Faulty outdoor unit PC board (Note 1)3 — Power supply abnormality, or faultyoutdoor unit PC board (Note 2)5 4 Activation of protection device (Note 3)Tester