Malfunction Analysis; Air-Conditioning Unit Does Not Run - Gree ETAC2-07HC230VA-A Service Manual

9.2 Malfunction Analysis

Air-conditioning
unit does not run
Air conditioning unit
is running but there
is no cooling effect
(or no heating effect)
40
No power supply
Fuse burn-out
Power voltage is too low
Switch failure
Failure of crystal oscillator or reset circuit
Connecting line is loose or incorrect.
T a r n f s r o m r e s i b o r k e n
Controller is broken
Temp contrller is improperlly adjusted
Too much dust on filter
Blockage of heat exchanger
Fan speed is set too low
Fan doesn't run or fan speed is too low
Check if switch is in off position, if socket and plug
is disconnected, and check if power supply failed or
cut off.
Replace fuse
Check power voltage. If it is 10% below rated
voltage ,inspect and repair line
Check if option switch (ON, OFF) is disconnected
with line, has mechanical failure;use universal
meter to check if contacts of switch are conducting;
if not, replace it with a new one with the same
model and spec.
Replace components with failure
Correct wrong connection by referring to
the electrical diagram attached on unit
R e p a l c e t a r n f s r o m r e
Replace controller
Adjust temp lower (or higher during heating)
Clean filter
Clean the dust on the surface of heat
exchanger
Set fan speed at middle or high
1. Wrong connection of wire 2.If capacitor is
broken 3.Malfunction of motor
Correct wire connection or replace broken
parts
Service Manual
Installation and Maintenance