Gree GMVVQ224WM/C-X Owner's Manual page 72

6.4 Maintenance at the End of Using Season
(1) Cut off the main power of the air conditioning unit.
(2) Clean the filter and indoor and outdoor units' body.
(3) Remove dust and debris from indoor and outdoor units.
(4) If the outdoor unit is rusted, smear the oil paint to prevent it from expansion.
6.5 Parts Replacement
Accessories are available through the nearby GREE office or GREE dealer.
NOTE!
Do not mix dangerous gases such as oxygen and acetylene into the refrigeration circuit during air
tightness and leak test! To avoid danger, it is best to use nitrogen for such tests.
7 Troubleshooting
7.1 Common Malfunction and Troubleshooting
Check the following items before asking for repair.
Phenomenon
The unit doesn't run.
Unit runs but stop
immediately
Abnormal cooling or
heating
NOTE!
If problem cannot be solved after checking the above items, please contact Gree service center
and show phenomena and models.
Following circumstances are not malfunction.
Reason
Without power supply
Voltage is too low
Broken fuse or breaker trips off
Insufficient energy of remote controller
Remote controller is out of control
scope
Air intake or outlet of indoor or outdoor
unit is blocked
Air intake or outlet of indoor or outdoor
unit is blocked
Improper temperature setting
Fan speed is set too low
Wind direction is not correct
Door or windows are opened
Direct sunshine
Too many people in the room
Too many heat resources in the room
Filter is blocked for dirt
GMV Heat Recovery DC Inverter VRF
Connect to power supply
Check if the voltage is within rating range
Replace fuse or connect breaker
Replace new battery
Control scope is within 8m
Remove obstruction
Remove obstruction
Adjust setting at wireless remote controller or
wired controller
Adjust setting at wireless remote controller or
wired controller
Adjust setting at wireless remote controller or
wired controller
Close the door or windows
Draw curtain or louver
—
Reduce heat resources
Clean the filter
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Measure