Full Gauge

MT-516RVTi Plus

MT Series • Refrigeration Controller

Type Refrigeration

Application Walk-in Cooler

Probe Inputs 2

Relay Outputs 4

Communication RS485 Modbus RTU + 0-10V

Panel Size 75x33 mm

R1 Compressor

R2 Defrost

R3 Fan

R4 Alarm

Dual probe controller with voltage monitoring and inverter output

Technical Specifications

Relay Outputs	4
Relay Rating	16A/250VAC (comp), 8A (others)

Operating Temp	-10 to 50°C
Storage Temp	-20 to 60°C

Terminal	Function	Type	Wire Color
L	Power L	Input	brown
N	Power N	Input	blue
S1	Probe 1 (Room)	Input	red/white
S2	Probe 2 (Evap)	Input	red/white
R1	Compressor	Output	black
R2	Defrost	Output	orange
R3	Fan	Output	green
R4	Alarm	Output	red
AO	0-10V Inverter	Output	purple
A/B	RS485	Comm	yellow/green

Important: Always disconnect power before wiring. Verify terminal numbers with the actual controller label before connecting.

Code	Parameter	Range	Default	Description
Set	Setpoint	-50 to 105	-18 °C	Temperature setpoint
Hys	Hysteresis	0.1 to 30	2 °C	Differential
VLo	Low Voltage	80 to 200	180 V	Low voltage cutoff
VHi	High Voltage	220 to 280	250 V	High voltage cutoff
VdL	Voltage Delay	0 to 30	3 min	Restart delay after voltage error
dF	Defrost Type	0=Off, 1=Elec, 2=Gas	1	Defrost method
dt	Defrost Duration	0 to 99	30 min	Max duration
dI	Defrost Interval	0 to 24	8 hr	Time between
Inv	Inverter Mode	0-1	0	0=Off, 1=0-10V output