R410a Full DC Inverter Mini VRF MCAC-VTSM-2013-12
120 Troubleshooting
7.14.2 L1/L4 troubleshooting
Step 1: Check the DC voltage between P and N terminal, the normal value should be 510V~580V, if the
voltage is lower than 510V, go to step 2.
Step 2: Check whether the wires of rectifier circuit are loose or not. If wires are loosen, fasten the wires. If
wires are OK, replace the PCB.
7.14.3 L2 troubleshooting
Step 1: Check the DC voltage between P and N terminal, the normal value should be 510V~580V, if the
voltage is higher than 580V, go to step 2
Step 2: Check the voltage between the capacitor, the normal value should be 510V±30V or 310V±30V, if not
in the range then the PCB has malfunction, it needs to be replaced.
range of the meter to
1kV and measure the
voltage between two
Filter
1-Phase
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