MrCool DIY-MULTI2-18HP230C, Service Manual

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 Troubleshooting 
Normal voltage of P and N
208-240V(1-phase,3-phase) 380-415V(3-phase)
In standby
around 310VDC around 530VDC
In operation
With passive PFC module With partial active PFC
module
With fully active PFC
module
/
>200VDC >310VDC >370VDC >450VDC
1.3 Reactor Check
Measure the resistance and voltage (to ground) of the reactor. The normal resistance should be around 0.1 ohm. Otherwise,
the reactor must have malfunction.
1.4 4-way valve Check
1.Power on, use a digital tester to measure the voltage, when the unit operates in cooling, it is 0V. When the unit
operates in heating, it is about equal to power supply voltage.
If the value of the voltage is not in the range, the PCB must have problems and need to be replaced.
2 Turn off the power, use a digital tester to measure the resistance. The value should be 1.8~2.5 KΩ.