Sinclair ASDH-96AI, Service Manual

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48
Step 2: Module check
1) DC voltage between terminal P and terminal N should be 1.41 times of the local power supply voltage.
2) DC voltage between terminal 1 and 2 should be 510V
～
580V.
3) Disconnect the terminal 3, 4, and 5 from inverter compressor. Measure the risistance between any two
terminals among terminal 1, 2, 3, 4, 5. All the values should be infinity. If any of the value approximates to 0,
the inverter module is damaged and should be replaced.
After replaced the inverter module, if the system is still abnormal, then go to step 3.
Step 3: DC generatrix check
Direction of the current in DC supply wire which is running through the inductor should be the same as the
direction of arrow marked on the inductor.
2) L1/L4 troubleshooting
Step 1:
Check the DC voltage between 1 and 2 terminal, the normal value should be 510V~580V, if the
voltage is lower than 510V, go to step 2.
N
3
2
4 5
1
P