Centralion 400VA - Line Mode Troubleshooting; Initial Checks and Fuse Integrity; Relay, Rectifier, and Signal Checks; Fault Indicators Diagnosis

2.2 Line mode examination (please refer flowchart)
If battery mode procedure are OK then check the following procedure.:
Procedure :
1 (1)Plug in input power cord at right voltage range.
(2)
Check if mani relay RY01 are active (230/240V models).
(1)
Check UPS if remains at line mode (for 120V models).
2.
Check if input fuse is open.
1.
Replace fuse.
4.
(1)Replace main relay(230/240V models).
(2)
Turn to procedure (6) (120V models)
5.
Check UPS if remains at line mode.
1.
Check if full bridge rectifier is short.
2.
Replace abnormal diode
3.
Check Q14 (2222ASM collector) if there is zero crossing signal.
4.
Replace abnormal Q14.
5.
Replace PCB.
6.
Check if buzzer beeps continuously and fault LED lights.
7.
Check if main relay (RY01) is bad.
8.
Replace abnormal main relay (RY01).
9.
Replace PCB.
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