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9.4 How to Check simply the main part
Y
Y
N
N
Y
N
Troubleshooting
(1)Malfunction of power supply from indoor unit to outdoor unit
Main inspection point:
Inspect the power supply plug seat with AC voltage gauge to check if the voltage between L and N is within 200VAC~240VAC;
Check with AC voltage gauge if the voltage between N 1and 3 of indoor wiring block is within 200VAC~240VAC;
Check with AC voltage gauge if the voltage between L and N of outdoor wiring block is within 200VAC~240VAC;
Energize the unit
and wait for 3min
Measure voltage between
N 1and 3 of indoor
wiring block
Voltage > 200V?
Measure voltage
between L and N
of outdoor wiring
block
Normal wiring?
Voltage > 200V?
Indoor main board error
Adjust wiring
Outdoor electric
box error
indoor and outdoor
wiring error
Replace main board
of indoor unit
Replace outdoor
electric box
Replace indoor
and outdoor wiring
Remove malfunction
(2) Indoor fan does not rotate without feedback
Main detection point:
z Is the control panel reliably connected with the electromotor? Is it loose?
Is the connecting sequence correct?
z Is the input voltage within the normal range (measure the voltage
between L and N of the wiring block XT with AC voltage gauge.)?
Malfunction diagnosis process:
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