Multi Zone Service Manual - General

5. Trouble Shooting

- 65 -

Only for training and service purposes

Check Point

1. Check the Input Voltage (L–N ‘ 220V±10%)

2. Check Input Voltage Sensor output voltage (2.5Vdc±10%)

Input voltage

• Abnormal Input voltage

(140Vac , 300Vac)

• Check the power source.

• Check the components.

Display

code

Title Cause of error Check point & Normal condition

Is Inverter PCB Normal?

Replace inverter PCB assembly

Is input voltage normal ?

Check L~N Voltage is 220V±15%

Yes

< Input Power Source Check Point >

Recheck power and

installation condition

Yes

n Error Diagnosis and Countermeasure Flow Chart