SG-38MARB-01 Specifications subject to change without notice.
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4 - Way Valve Check
1. Power on, use a digital tester to measure the voltage; when the unit operates in the
COOLING
mode, the voltage is 0V. If the voltage value is not
in range, the PCB is faulty and needs to be replaced.
Fig. 46 — Measure the voltage
2. Turn off the power, use a digital tester to measure the resistance. The value should be 1.8~2.5 K
Fig. 47 — Use a digital tester to measure resistance