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38MGRBQ: Service Manual
WIRING DIAGRAMS
Size 18K (18R)
U~V~W among
phases 0~250VAC
CODE
COMP
Compressor
EEV
Electric Expansion Valve
FM1
DC Fan Motor
HEAT_D
Chassis Heater
HEAT_Y
Crankcase Heater
H-PRO
High Pressure Switch
L-PRO
Low Pressure Switch
SV
Reversing Valve
TP
Comp. Discharge Temperature Sensor
T3
Outdoor Coil Temperature Sensor
T4
Outdoor Ambient Temperature Sensor
COMP TOP
Compressor TOP OLP Temperature Sensor
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Connect to FAN
voltage among
phases 0~200VAC
Input:0-5VDC
Output:230 VAC
Output:230 VAC
Output:230 VAC
Fig. 8 — Wiring Diagram Size 18K (18R) - 2 Zone
Table 2 — Wiring Diagram Size 18K (18R) - 2 Zone Max Codes
Input:0VDC
Input:0-5VDC
MAIN CONTROL BOARD
L-IN and N-IN
Intput:230 VAC
Output:5VDC
8
Input:5VDC
PART NAME
7
Input:0-5VDC
Output:12VDC
SA/SB and N-IN
Input:0-24VAC
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