Test The Dc Voltage; Ipm (For Dual/Tri-Zone) - Carrier 38MGR Series Service Manual

DIAGNOSIS AND SOLUTION (CONT)
Use a multimeter to test the DC voltage between the L2 port and S port of the outdoor unit. The red pin of the multimeter connects with the L2
port while the black pin is for the S port. When AC is running normally, the voltage moves alternately between positive and negative values.
38
Fig. 43 —Test the DC voltage
Fig. 44 — IPM (For dual/tri-zone)
Specifications subject to change without notice.
Standby
38MGR-04SM