Mitsubishi Heavy Industries SRF-ZMX-S User Manual

f
Expected Readings of Control PWB VDC Outputs to
DCFM
Expected Readings of DC Fan Motor Circuit Board
Resistances
Multi Meter Test Points for VDC
Multi Meter Test Points for Ω
Multimeter Red
Probe
Multimeter
Black Probe
PCB DC Volts
Multimeter
Black Probe
Multimeter
Red Probe
DCFM PWB Resistance
Value
Vm
Gnd
# 300 ~ 350 Vdc
Vm
Gnd
# > 1 MΩ
Vcc
Gnd
# 15 Vdc
Vcc
Gnd
# > 4 KΩ
Vsp
Gnd
* 2 ~ 7 Vdc
Vsp
Gnd
# > 100 KΩ
Vfg
Gnd
* 2 ~ 7 Vdc
Vfg
Gnd
* All Series – Voltages are only present during operation.
# ZM Series onwards - Voltages are only present
during operation.
# If Resistance Values are ok, confirm with DCFM Tester.
Note: If no resistance value is evident, reverse multimeter
probes and re-test.
Wiring of DC Fan Motor
DC Fan Motor Type
Type A
Type B / C
Type D
Vm
Motor Power Voltage Input
Red
Red
Red
Gnd
Ground
Black
Blue
Black
Vcc
Control Power Voltage Input
White
Brown
White
Vsp
Speed Control Voltage Input
Yellow
Orange
Yellow
Vfg
Revolution Pulse Output
Blue
White
Blue
IMPORTANT NOTE: The current version of the DCFM Tool, Part No: RMA006A012A (short/wide model) can run/test
the Type C fan motor. The original version of the DCFM Tool, Part No: RMA006A012 (long/narrow model) cannot
run/test the Type C fan motor.
DC FAN MOTOR TESTING

Mitsubishi Heavy Industries SRF-ZMX-S Specifications

General

Brand	Mitsubishi Heavy Industries
Model	SRF-ZMX-S
Category	Air Conditioner
Language	English