To Next PageTo Next PageWhy is my Mitsubishi Electric Controller water circulation pump so noisy?
If you are experiencing noise from the water circulation pump, it is likely due to air in the pump. Use manual and automatic air vents to remove air from the system. Top up water if necessary to achieve 1 bar on the primary circuit.
Why does the heating mode on my Mitsubishi Electric Controller take so long to start?
If the heating mode has been on standby for a long time (does not start operation smoothly), it may be because the time of “Delay” set in “Economy settings for pump” is too short. Increase the time of “Delay” in “Economy settings for pump.
Why are the electric heaters activated soon after DHW or LP mode starts after cooling on my Mitsubishi Electric PAC-SIF051B-E Controller?
If the electric heaters are activated shortly after DHW or LP mode starts running after Cooling mode, it is because the setting time period of Heat-pump-only operation is short. Adjust the setting time period of Heat-pump only operation.
How to troubleshoot a blank display on my Mitsubishi Electric PAC-SIF051B-E Controller?
If the main remote controller display is blank, it could be due to a lack of power supply or a display issue. First, check LED2 on the FTC (Main). If it's lit, inspect the main remote controller wiring for damage or contact failure. If LED2 is blinking, further investigation is needed. If LED2 is off, additional troubleshooting steps are required. Also, check for any disconnection between the main remote controller cable and the FTC (Main) control board. If 'Please Wait' is not displayed, the main remote controller might be faulty. If 'Please Wait' is displayed, further investigation is needed.
Why doesn't the cooling system cool down to the set temperature on my Mitsubishi Electric PAC-SIF051B-E Controller?
If the cooling system does not cool down to the set temperature, it could be because the water in the circulation circuit is unduly hot, causing Cooling mode to start with a delay to protect the outdoor unit. It could also be because the outdoor temperature is lower than the preset temperature below which the freeze stat. function is activated, preventing Cooling mode from starting. To run Cooling mode overriding the freeze stat. function, adjust the preset temperature below which the freeze stat. function is activated.
Why does the room temperature rise during DHW operation with my Mitsubishi Electric PAC-SIF051B-E Controller?
If the room temperature rises during DHW operation, it is likely due to a 3-way valve failure. Check the 3-way valve.
In 2-zone temperature control, why does only Zone2 not reach the set temperature on my Mitsubishi Electric PAC-SIF051B-E Controller?
In 2-zone temperature control, if only Zone2 does not reach the set temperature, it could be due to several reasons. When Zone1 and Zone2 are both in heating mode, the hot water temperature in Zone2 does not exceed that in Zone1. There may be faulty wiring of the motorized mixing valve, faulty installation of motorized mixing valve, incorrect setting of Running time, or motorized mixing valve failure. There is no action necessary.
Why is there no water at the hot tap of my Mitsubishi Electric PAC-SIF051B-E?
If you have no water at the hot tap, it could be that the cold main is off or the strainer (local supply) is blocked. Check and open the stop cock. Isolate the water supply and clean the strainer.
Why does water heating take longer with my Mitsubishi Electric Controller?
If the water heating is taking longer than usual, it could be due to several reasons. The heat pump may not be working, the booster heater cut-out might have tripped, or the booster heater breaker tripped. The booster heater thermal cut-out may have tripped and cannot be reset using the manual reset button. The immersion heater cut-out may have been triggered, or the immersion heater breaker tripped. There may also be a decreased flow rate in the DHW circuit (only when the external plate HEX for DHW is used).
Why is the LED4 on my Mitsubishi Electric PAC-SIF051B-E FTC (Main) off?
If the LED4 on the FTC (Main) is off, it may be because the SD memory card is not inserted correctly or you are not using an SD standards compliant memory card. Correctly insert the SD memory card in place until a click is heard. Use an SD standards compliant memory card.
General| Brand | Mitsubishi Electric |
|---|---|
| Model | PAC-SIF051B-E |
| Category | Controller |
| Language | English |
Covers warnings and cautions for installation, handling, and operation to prevent injury or damage.
Essential checks and warnings to be observed before starting system operation after installation.
Highlights safety warnings and requirements when connecting booster or immersion heaters to the unit.
Provides definitions for technical terms and abbreviations used throughout the manual.
Provides guidance on choosing the optimal and safe location for installing the FTC unit.
Details the step-by-step process for physically mounting and installing the FTC unit.
Outlines the initial electrical connections required for system setup.
Explains how to identify and configure the outdoor unit type within the system.
Details the function settings for various system components like DHW tanks and heaters.
Covers essential components and requirements for designing a safe and effective system.
Describes configurations for local systems, including 1-zone and 2-zone controls.
Provides a diagram and component list for 2-zone temperature control piping.
Explains how to monitor energy consumption and heat delivery through the system.
Details electrical connection procedures, wiring diagrams, and specifications.
Covers the wiring, installation, and mounting of the main remote controller.
Describes various configurations and options for the main remote controller.
Explains the connection procedures for various thermistor types used in the system.
Details how to connect input signals and output terminals for system control.
Provides specific wiring instructions for connecting booster and immersion heaters.
Covers wiring specifics for implementing 2-zone temperature control.
Explains how to configure the system for smart grid ready functions.
Details the installation steps, wiring, and precautions for a DHW tank.
Describes how to use an SD memory card for settings and logging operations.
Explains the purpose and location of DIP switches for system configuration.
Details DIP switch settings for specifying the outdoor unit type.
Explains DIP switch settings for various system functions like DHW, heaters, and mixing tanks.
Covers DIP switch settings related to operational modes and heating.
Explains DIP switch settings for emergency modes and indoor unit-only operation.
Lists essential checks to perform after installation and before system test run.
Describes how to perform self-checks and reset error codes displayed by the system.
Provides essential safety guidelines for users operating the main remote controller.
Explains the components, screen layout, and icons of the main remote controller.
Guides on performing initial system setup and configuration via the remote controller.
Explains how to navigate through the various menus and functions of the remote controller.
Describes the basic operation modes and information displayed on the main screen.
Explains the option screen and access to the main settings menu.
Details how to select and configure room sensors for temperature monitoring.
Explains settings for domestic hot water heating and legionella prevention.
Describes various heating/cooling modes like auto-adaptation, flow temp., and compensation curve.
Covers how to configure holiday mode for energy saving during unoccupied periods.
Explains how to set up heating/cooling and DHW schedules for different periods.
Details functions available in the service menu for installer-specific settings.
Covers operation settings like flow temperature range, freeze stat, and floor dry up functions.
Explains how to manage password protection and perform manual system resets.
A form for recording field settings and commissioning data for future reference.
Lists common fault symptoms, their possible causes, and recommended solutions.
Outlines the requirements for connecting multiple outdoor units in a system.
Describes pipe work configurations for multi-unit systems, including system examples.
Details electrical connection procedures for master and slave units in multi-unit systems.
Explains how to wire the main remote controller in multi-unit setups using daisy-chaining.
Details thermistor connections specifically for slave controllers in multi-unit systems.
Covers DIP switch configurations required for controlling multiple outdoor units.
Explains input/output connections for slave controllers in multi-unit systems.
Provides troubleshooting guidance for common issues in multiple outdoor unit systems.
Explains how the boiler functions as a back-up for heating operations.
Details specifications, performance, and maintenance for the heat exchanger.
