Gree FB01 - Routine Maintenance; Precautions

D Series Modular Air-cooled Scroll Chillers
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(2) Failure of the chilled water ow switch and the anti-freezing temperature sensor will cause the tube
frozen up, so the ow switch shall be interlocked with the chiller.
(3) When charging or recovering the refrigerant, the evaporator would crack because of frostbite provided
the refrigerant pressure inside the evaporator is under 0.4MPa. Therefore, be sure to keep the water
ow continually inside the evaporator or drain it completely.
7.11 Routine Maintenance
Routine maintenance shall be performed periodically by the qualied technician so as to extend the
service life of the unit and lower the possibility of occurrence of faults.
Record and keep the running status of the unit to facilitate troubleshooting for the servicemen.
◆
Daily Maintenance
(1) Check the circulating water pump and the ow rate.
(2) Check the voltage and power supply.
◆
Weekly Maintenance
(1) Check if the oil level keeps more than half of the sight glass, however the oil shall not be overcharged.
(2) Check the main unit, like if the compressor runs with abnormal noise, if the distribution box is attached
securely and if the pipeline generates abnormal vibration or leakage.
(3) Record key parameters, like pressure, pressure etc.
◆
Quarterly Maintenance
(1) Check the electric wiring and electric insulation.
(2) Check and adjust the set point of the temperature.
◆
Yearly Maintenance
(1) Check valves and pipeline of the water system. If necessary, clean the lter and analyze the water
quality. If the water circuit needs to be cleaned, please consult the assistance of the qualified
personnel.
(2) Clean the corrosive surface and paint it again, and check if the door of the electric control cabinet is
tightly closed.
(3) Check if the pipeline is secured and so the water pump and ttings. Additionally, check if the refrigerant
charge is sufcient, if not, add some.
(4) Perform the items for weekly maintenance.
(5) Check if the control device is set and acts properly.
(6) Check if the refrigerant pipe is attached securely.
(7) Check if the motor coil is insulated.
7.12 Precautions
(1) Take periodic maintenance to the unit to guarantee normal operation.
(2) Once refrigerant leaks, shut down the unit immediately and contact the serviceman. No open re is
allowed in that refrigerant will decompose into toxic gas.
(3) Switch off the main power supply in case of a re hazard and extinguish it with effective measures.
(4) The working environment shall be far away from the inammable substance, such as petroleum and
alcoholic etc. to avoid explosion.
(5) The unit is allowed restarted only after any malfunction is eliminated, otherwise refrigerant or chilled
water would leak, in which case, it is imperative to turn off all switches or the main power supply.
(6) Do not short-circuit the protection device, otherwise it would cause some malfunction.