Mitsubishi Electric RMF-CA100-V1 - User Manual

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© Mitsubishi Electric Sales Canada Inc. All rights reserved.
RMF-CA100-V1 Thermostat Interface
INSTALLATION / INSTRUCTION MANUAL
Read prior to installing/operating device. Keep this manual for future reference.
Contents
1. Supplied Parts. ........................................................................... 1
1-1. Optional Parts. ............................................................................ 1
2. Safety Precautions ..................................................................... 1
3. Installation ....................................................................................... 1
3-1. Configuration Options…………………………………………………….2
4. System Configuration ...................................................................... 3
5. Operator Instruction………………………………………………………3
6. Troubleshooting ......................................................................... 3
7. Error Codes……………………………………………………………4
1. Supplied Parts
RMF-CA100-V1 Thermostat Interface (1)
RMF-CA100 Manual (1)
1-1. Optional Parts
PAC-SE41TS-E Remote Sensor – Part is recommended for applications with a large delta-t (Δt) between the 3
rd
party
thermostat sensing location and the return air thermistor (TH1).
Please review troubleshooting section below prior to installation of PAC-SE41TS-E Remote Sensor.
2. Safety Precautions
THOROUGHLY READ THE FOLLOWING SAFETY PRECAUTIONS BEFORE EACH USE OF THIS PRODUCT (THE “DEVICE”).
• Do not expose the device to, or immerse the device in, water. Doing so could lead to electrical shock to a person, device malfunction or
device damage.
• Do not install the device in a bathroom, kitchen, or any room where high humidity or steam could form. Condensation could develop on or around
the device and cause electrical shock to a person, device malfunction and device damage.
• Do not install the device in a location where a gas leak could occur.
• Do not expose the device to heat or radiation, including direct sunlight, or install the device in a location where the temperature could be greater
than 40°C (104°F) or less than 0°C (32°F). This could result in device deformation or device malfunction.
• Always ensure the device is installed in an area without exposure to high frequency noise.
• Power generators, inverters, and high-frequency or radio communication equipment may interfere with the operation of this device.
• All electrical work should be performed by a qualified technician and in accordance with applicable laws and instructions outlined in this
manual.
• Use standard wiring with the proper current capacity to avoid current leak, excessive heat, and fire.
• Use only specified cables and wiring; securely connect each so that the terminals do not bear any weight.
• Include slack in the power supply wiring. Tension in the wiring may cause it to excessively heat up and break, which could result in a fire.
• Improperly connected or short-circuited cables or wiring may produce heat and cause device malfunction, device damage, and fire.
• Capacity shortage to the power supply circuit or improper installation may result in electrical shock or fire.
• Do not modify or alter this device or cable in any manner whatsoever.
3. Installation
Thermostat may be configured for use with a conventional system.
• Make all connections with 18 AWG thermostat wire.
• Wire connection terminals support 20-30VAC.
• High/medium/low fan signals (G1, G2, G3) are optional, and may not be available on all thermostat models.
WARNING - INCORRECT HANDLING CAN RESULT IN ELECTRICAL INJURY, DEVICE MALFUNCTION AND DAMAGE

Summary

2. Safety Precautions

3. Installation

3-1. Configuration Options

Explains two-stage and single-stage operation configurations using dipswitches and pin layouts.

4. System Configuration

Device Configuration

Details initial settings via dipswitches and access to the circuit board.

5. Operator Instructions

Menu Options Overview

Lists primary menu categories: Error History, Mode Settings, Fan Speed, Test, Time, Thermo Input, FW Version.

Error History Screen

Displays saved error codes with time/date, allowing navigation between up to 10 errors.

Mode Setting Screen

Allows configuration of mode settings and G-fan speed submenu for 28 modes.

Test Settings

6. Troubleshooting

Blank LED Screen

Unit Does Not Operate (Heat, Cool, Fan)

Troubleshooting steps for issues with the unit not operating in any mode.

Unit Does Not Operate Correctly in Cooling

Steps to diagnose and resolve issues when the unit operates incorrectly in cooling mode.

Unit Does Not Operate Correctly in Heating

Steps to diagnose and resolve issues when the unit operates incorrectly in heating mode.

7. Error Codes

M and P Series Error Codes

Lists communication, thermistor, indoor unit, and outdoor unit error codes specific to M and P series.

City Multi Error Codes

1000 - Pressure; Temperature Error Codes

Overview

1. Function Description
2. Important Technical Specifications
3. Usage Features
4. Maintenance Features

The RMF-CA100-V1 is a Thermostat Interface designed for use with Mitsubishi Electric HVAC systems, enabling control via a third-party thermostat. This device acts as an intermediary, translating signals from a conventional thermostat to the Mitsubishi Electric indoor unit.

Function Description:

The primary function of the RMF-CA100-V1 is to provide an interface between a standard dry-contact thermostat and a Mitsubishi Electric indoor unit. It supports both two-stage cooling and heating operations, as well as a simulated VRF single-stage operation. In two-stage mode, the device utilizes W1, W2, Y1, Y2, and G (fan) signals from the thermostat. For single-stage operation (Simulated VRF), it can be configured to simulate multiple stages based on W1/Y1 calls and run time, which is useful when the thermostat does not provide Y2 or W2 signals.

The device relies on both the dry-contact thermostat and the indoor unit's thermistors for room temperature monitoring. The thermostat establishes the set temperature, while the Mitsubishi Electric indoor unit's return air thermistor is used for cooling and heating calculations.

Important Technical Specifications:

• Wiring: All connections should be made with 18AWG thermostat wire.
• Power: Wire connection terminals support 20-30VAC.
• Fan Signals: High/medium/low fan signals (G1, G2, G3) are optional.
• Auxiliary Heat: Auxiliary heat control is handled by the Mitsubishi Electric CN24 connector on compatible indoor units, not directly by the RMF-CA100.
• Temperature Range: The device should not be exposed to temperatures greater than 40°C (104°F) or less than 0°C (32°F).
• Display: Features a 2-line/16-character LCD display for operation mode, fan speed, and menu navigation.
• Controls: Four buttons (UP, DOWN, OK, MENU) for navigating menus and system configuration.
• Remote Sensor: The PAC-SE41TS-E Remote Sensor is an optional accessory recommended for applications with a significant temperature difference (delta-t) between the thermostat's sensing location and the return air thermistor (TH1).

Usage Features:

• Configuration Options:
  • Two-Stage Cooling and Heating (Default): Dipswitch 1-1 set to OFF. Uses W1, W2, Y1, Y2, and G signals. G1, G2, G3 are available but not required.
  • Single-Stage Operation (Simulated VRF): Dipswitch 1-1 set to ON. Configures single-stage operation, simulating multiple stages based on W1/Y1 calls and run time, especially when Y2 or W2 are unavailable from the thermostat.
• Fan Speed Control: Fan speed can be defined by Dipswitches SW1-3 and SW1-4 during stage 1 operation when G1, G2, and G3 are inactive. Options include Low (DEFAULT), Medium, High, and Quiet. When G1, G2, or G3 are energized, they take precedence over the dipswitch settings.
• Simulated VRF Capacity Increase Time-Delay: When SW1-1 is ON, the capacity increase time-delay can be set via Dipswitches SW1-5 and SW1-6 to 10, 15, 20 (DEFAULT), or 25 minutes.
• Operator Interface:
  • Main Screen: Displays current OPERATION MODE (HEAT, COOL, INPUT-ERR, HTG HOLD, FAN G1/G2/G3, NO CALL) and FAN speed (LOW, MED, HIGH, OFF).
  • Menu Screen: Accessed via the MENU button, offering options like ERROR HISTORY, MODE SETTINGS, TEST SETTINGS, TIME SETTINGS, THERMO INPUT, and FW VERSION.
  • Mode Settings: Allows configuration of 28 modes and G-fan speed submenu. Modes are displayed with availability (1, 2, or 3) or unavailability.
  • Test Settings: Provides options for NO TEST, HEAT TEST (forces HEAT operation at HIGH fan, 27°C set temp), and COOL TEST (forces COOL operation at HIGH fan, 16°C set temp). Test modes automatically exit after 1 hour.
  • Time Settings: Used to set the Date and Time.
  • Thermo Input Screen: Displays the state of six thermostat inputs (W1, W2, Y1, Y2, G, G1, G2, G3) to assist in troubleshooting and confirming signal reception (0 = No signal, 1 = Receiving signal).
• Power Failure Auto Restart: Dipswitch SW1-9 controls whether the unit auto restarts after a power failure (Not effective or Effective*).
• Indoor Temperature Detecting: Dipswitch SW1-1 sets the temperature sensing location to "At fan coil*" or "At remote control".
• Fresh Air Intake: Dipswitch SW4-4 controls fresh air intake (Not effective* or Effective).
• Humidifier Control: Dipswitch SW1-6 configures humidifier operation "During heating operation*1" or "Always on while in heating mode *2".
• Filter Cleaning: Dipswitch SW1-3 sets the filter cleaning interval to "Set to 100H" or "Set to 2500H*".
• Heater Control: Dipswitch SW3-2 determines if a heater is "unavailable*" or "available".
• Heater Control During Defrost and Error: Dipswitch SW3-4 sets heater control during defrost and error to "Unavailable*" or "Available".
• Main Power Voltage: Dipswitch SW5 sets the main power voltage to 220V or 240V, depending on site requirements.

Maintenance Features:

• Troubleshooting: The manual provides comprehensive troubleshooting tables for various issues, including blank LED screen, unit not operating (heat, cool, fan mode), and incorrect operation in cooling or heating. These tables list checkpoints (e.g., checking CN105 connector, power supply, thermostat wire connections, TH1 thermistor value, mode settings, insulation, and air-leaks in ductwork) and remarks to guide diagnosis.
• Error Codes: A dedicated section lists M and P Series Error Codes (Communication, Thermistor, Indoor Unit, Outdoor Unit) and City Multi Error Codes (Pressure/Temperature, Water, Power/Inverter, Thermistor/Transducer, Communication, System Settings). These codes help identify specific malfunctions within the HVAC system.
• Safety Precautions: Emphasizes critical safety measures, including avoiding water exposure, installation in high-humidity areas, gas leak locations, or extreme temperatures. It also highlights the importance of professional electrical work, standard wiring, proper current capacity, secure connections, and avoiding device modification.
• Firmware Version: The menu screen allows checking the device's firmware version.

Mitsubishi Electric RMF-CA100-V1 Specifications