Part 4 Trouble Shooting
- 105 -
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Purpose
Checking Bride Diode parts for fault.
Items for checking
1. Checking B/D for damage
■ How to check B/D of Discrete PFC(Diode Mode)
1. Remove the connector from PCB.
2. Set the Multi-Tester as Diode Voltage Measurement Mode. (
)
3. Measure the voltage as shown in Fig. 1.
4. Measure the voltage as shown in Fig. 2.
5. If the measurements are significantly different from the levels shown in the figures, the Bride Diode is
deemed to be damaged.
Checking Discrete PFC(PCBA: 4.5kW, 6kW)
[Fig. 1]
+
~~
-
0.4 ~ 0.6 V
BlackRed
Sequence of
Measurement
Measurem
ent
Normal
Standards
1 + - ~ 0.4 V~0.6 V
2 + - ~ 0.4 V~0.6 V
Sequence of
Measurement
Measurem
ent
Normal
Standards
1
_
- ~ 0.4 V~0.6 V
2
_
- ~ 0.4 V~0.6 V
[Fig. 2]
0.4 ~ 0.6 V
BlackRed
+
~~
-
6.7 Troubleshooting Outdoor Error
CH 23 (DC Link Voltage Low)
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