R410A All DC Inverter Mini VRF MCAC-VTSM-2014-10
98 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.
Turn the measure
range of the meter to
1kV and measure the
voltage between two
electrolytic capacitors
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