How To Check Simply The Main Part - Toyotomi GAG-A128GVR Service Manual

9.4 How to Check simply the main part

(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;
(2) Indoor fan does not rotate without feedback
Main detection point:
Is the control panel reliably connected with the electromotor? Is it loose? Is the connecting sequence correct?
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:
42
Energize the unit
and wait for 3min
Measure voltage between
N 1and 3 of indoor
wiring block
Y
Voltage > 200V?
N
Normal wiring? N
Y
Indoor main board error
Adjust wiring
Replace main board
of indoor unit
Measure voltage
between L and N
of outdoor wiring
block
Voltage > 200V?
Y
Outdoor electric
box error
Replace outdoor
electric box
Remove malfunction
Troubleshooting
N
indoor and outdoor
wiring error
Replace indoor
and outdoor wiring