Unit Maintenance; Odu Heat Exchanger; Discharge Pipe; Pre-Season Cautions - Gree Ultra Heat GMV Multi VRF Heat Pump Series Service Manual

Ultra Heat GMV VRF Technical Service Manual
7. Check and install the front
panels.

5 UNIT MAINTENANCE

Check and maintain the unit periodically can prolong the service life of the unit. Please appoint
professional person to conduct the maintenance.

5.1 ODU Heat Exchanger

ODU heat exchangers should be cleaned regularly, two months a time at least. Use an absorber
and nylon brush to clear surface dusts and stains. If a compressed air ejector is available, spray the
heat exchanger with the ejector to clear the dirt. Water is prohibited.

5.2 Discharge Pipe

Periodically check discharge pipes for blockage to make condensing water discharged freely.

5.3 Pre-Season Cautions

(1) Check IDU and ODUs' air inlets and outlets for blockage.
(2) Check whether they are properly earthed.
(3) Check batteries of the remote control.
(4) Check whether air filters have been properly installed.
(5) Turn the power switch on 8 hours beforehand to pre-heat the outdoor compressor crankcase
before the unit is restarted after being in idle status for a long time.
(6) Check ODU installation. If an abnormality is found, please contact GREE's maintenance center.

5.4 Post-Season Maintenance

(1) Disconnect the general power supply.
(2) Clean air filters and ODUs.
(3) Clear dusts and stains off IDUs and ODUs.
(4) For rusty ODUs, apply some paint on them to prevent deterioration.

5.5 Parts Replacement

Contact GREE's local office or dealers to obtain parts.
Note: In the course of air tightness and leakage test, prevent oxygen or acetylene from entering
cooling circuits. Nitrogen or refrigerant is recommended.
●Check various parts and connecting lines.
●If no problem is found, hook the front panels
and tighten the screws.
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MAINTENANCE