Download 1 - Ventia

5. Trouble Shooting
Display
code
25
Title
Input Voltage high/low
Cause of error
Check point & Normal condition
Input voltage is over limited 1. Input voltage abnormal (R-S-T)
value of the product (140V 2. Outdoor unit main PCB assembly damage
or less, 300V or more)
(input voltage sensing part)
n Error Diagnosis and Countermeasure Flow Chart
Are there any power wire
connections normal?
No
1. Check L/N/G wiring conditions
→ Rewire them if abnormality found.
Yes
Is input voltage normal?
No
Check
R~S/S~T/T~R phase voltage is 220V 10%
→ Check connection condition and wiring if power is
abnormal
Yes
Is main PCB assembly power
connection normal?
No
Check connection between main PCB assembly and bridge
diode(misconnection, disconnection)
→ wiring again if abnormality found
No
Replace main PCB assembly.
Yes
Monitoring PCB LED display error
Yes
Recheck power and installation condition
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