CLIVET WSAN-YMi Series

Questions and Answers

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Brad ScottAug 14, 2025
Why is my CLIVET WSAN-YMi not heating or cooling properly?
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  Sheri OlsonAug 14, 2025
  If your CLIVET Air Conditioner isn't heating or cooling as expected, it could be due to several reasons. First, check if the temperature setting on the controller is correct (T4HMAX, T4HMIN in heat mode; T4CMAX, T4CMIN in cool mode; T4DHWMAX, T4DHWMIN in DHW mode). Also, ensure that the water flow isn't too low by verifying that all shut-off valves are completely open, the water filter is clean, there's no air in the system, the water pressure is above 1 bar when cold, the expansion vessel isn't broken and the resistance in the water circuit isn't too high for the pump. Finally, check that the water volume in the installation is above the minimum required value.
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Joseph SmithAug 17, 2025
What to do if CLIVET WSAN-YMi Air Conditioner has space heating capacity shortage at low outdoor temperatures?
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  Melissa SmithAug 17, 2025
  If you're experiencing a space heating capacity shortage with your CLIVET Air Conditioner during low outdoor temperatures, it might be due to the backup heater not being activated. Check that the 'OTHER HEATING SOURCE/ BACKUP HEATER' is enabled and verify that the thermal protector of the backup heater hasn't been activated. Also, ensure the booster heater isn't running simultaneously with the backup heater. Another possible cause is too much heat pump capacity being used for heating domestic hot water. To resolve this, check that the 't_DHWHP_MAX' and 't_DHWHP_RESTRICT' are configured appropriately, disable the 'DHW PRIORITY' in the user interface, and enable the 'T4_TBH_ON' in the user interface/FOR SERVICEMAN to activate the booster heater for domestic water heating.
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cochrankyleAug 21, 2025
How to fix a CLIVET WSAN-YMi Air Conditioner when the compressor isn't starting?
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  Vincent BarnesAug 21, 2025
  If the compressor of your CLIVET Air Conditioner isn't starting for space heating or domestic water heating, it could be because the unit is starting up outside of its operation range due to low water temperature. In this case, the system uses a backup heater to reach the minimum water temperature (12°C). Check that the backup heater power supply is correct, the thermal fuse is closed, the thermal protector isn't activated, and the contactors aren't broken.
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nicholas23Aug 25, 2025
Why is the pump in my CLIVET WSAN-YMi making noise (cavitation)?
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  Margaret HayesAug 25, 2025
  The pump in your CLIVET Air Conditioner might be making noise (cavitation) because there is air in the system. If so, purge the air. Alternatively, the water pressure at the pump inlet might be too low. Check that the water pressure is greater than 1 bar when the water is cold, ensure the manometer isn't broken, verify the expansion vessel isn't broken, and confirm the setting of the pre-pressure of the expansion vessel is correct.
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Holly HuffmanAug 28, 2025
What to do if CLIVET Air Conditioner DHW mode can’t change to Heat mode immediately?
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  sandersrobertAug 29, 2025
  If your CLIVET Air Conditioner can't switch from DHW mode to Heat mode immediately, it could be due to several reasons. The heat exchanger for space heating might not be big enough, in this case set t_DHWHP_MAX to a minimum value (the suggested value is 60min), connect the circulating pump out of the unit to the unit if it is not already controlled by it, and add a 3-way valve at the inlet of the fan coil to ensure enough water flow. Alternatively, the space heating load might be small, in which case no heating is needed. Finally, if the disinfect function is enabled but without TBH, disable the disinfect function, and add TBH or AHS for DHW mode.
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Ronald BushSep 1, 2025
Why does the water pressure relief valve open on my CLIVET WSAN-YMi?
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  jessica92Sep 1, 2025
  The water pressure relief valve on your CLIVET Air Conditioner might open if the expansion vessel is broken, in which case you should replace it. Another reason could be that the filling water pressure in the installation is higher than 0.3MPa. Make sure that the filling water pressure in the installation is about 0.15~0.20MPa.
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osborntammieSep 5, 2025
What to do if CLIVET WSAN-YMi DHW mode heat pump stops but setpoint not reached, space heating require heat but unit stay in DHW mode?
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  Nichole ThomasSep 5, 2025
  If the CLIVET Air Conditioner's DHW mode heat pump stops working before reaching the setpoint, and the unit remains in DHW mode despite space heating being required, it could be because the surface of the coil in the tank isn't large enough. In this case set t_DHWHP_MAX to a minimum value (the suggested value is 60min), connect the circulating pump out of the unit to the unit if it is not already controlled by it, and add a 3-way valve at the inlet of the fan coil to ensure enough water flow. Also, it could be because TBH or AHS is not available. The heat pump will stay in DHW mode until t_DHWHP_MAX is reached or the setpoint is achieved. Add TBH or AHS for DHW mode, ensuring they are controlled by the unit.
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Jill OrozcoSep 9, 2025
What to do if the water pressure relief valve leaks in CLIVET WSAN-YMi?
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  Maurice MaynardSep 9, 2025
  If the water pressure relief valve on your CLIVET Air Conditioner is leaking, it may be due to dirt blocking the valve outlet. Check for correct operation of the pressure relief valve by turning the red knob on the valve counter clockWise. If you do not hear a clacking sound, contact your local dealer. In case the water keeps running out of the unit, close both the water inlet and outlet shut-off valves first and then contact your local dealer.

Summary

Rapid guide

Domestic Hot Water, Boiler, and Solar Panels

Overview of domestic hot water, boiler, and solar panel system connections and operations.

External Signals and Remote Control

Explanation of external signals and configuration for remote on/off control.

Backup Heater, Thermostat, and Fancoil Systems

Details on backup heater, thermostat controls, and radiant panel/fancoil system configurations.

Product Line Specifications

Product Line Details

Table detailing product sizes, nominal kW, and power supply options.

Safety Precautions

Hazard Symbols and General Warnings

Explanation of hazard symbols and key safety instructions for operation.

Electrical and Installation Safety Details

Detailed safety instructions covering electrical hazards, installation risks, and property damage warnings.

Installation Location and System Precautions

Cautionary notes regarding installation sites, grounding, and system usage.

Refrigerant Information and Leak Checks

Information on fluorinated gases, GWP, and refrigerant leak check frequency.

General Information

Unit Applications and Features

Overview of unit applications, antifreeze function, and optional accessories.

Domestic Hot Water Tank Requirements

Specifications and requirements for connecting domestic hot water tanks.

Installation Accessories

List of accessories supplied with the unit and available from the supplier.

Operating Conditions

Cooling Mode Operation Range

Specifies minimum leaving water temperature at different outdoor temperatures.

Heating and DHW Mode Operation Ranges

Details operational temperature limits for heating and domestic hot water modes.

Dimensional Data

Unit Dimensions and Component Layout

Provides physical dimensions and key component locations for different unit sizes.

Installation

Unit Handling and Installation Site

Instructions for safely handling the unit and selecting an appropriate installation site.

Installation Requirements and Climate Considerations

Details on foundation, wind protection, and climate-specific installation advice.

Servicing Space Requirements

Specifies required clearances for servicing stacked and multiple-row installations.

Typical Applications

Application 1: Space Heating with Room Thermostat

Illustrates a system for space heating controlled by a room thermostat.

Application 2: DHW and Space Heating (No Thermostat)

Describes a system for DHW and space heating without a room thermostat.

Application 3: Combined Heating;Cooling and DHW

Details a system for cooling, heating via fan coils, and DHW.

Application 5: Auxiliary Boiler Integration

Illustrates systems where an auxiliary boiler provides heat for space and/or DHW.

Application 6: Dual Setpoint Function

Explains a dual setpoint system for floor heating and fan coil units.

Application 7: Dual Setpoint without Room Thermostat

Describes a dual setpoint system for cooling/heating without a room thermostat.

Water Connections

Water Quality and Cleaning Procedures

Information on water quality, hardness, and system cleaning guidelines.

Hydraulic System and Piping

Guidance on hydraulic systems, piping, and anti-freeze protection measures.

Expansion Vessel and Water Volume Checks

Instructions for checking and adjusting expansion vessel pre-pressure and water volume.

Glycol Usage and Anti-freeze Protection

Details on preventing freezing using glycol and related safety precautions.

Electrical Connections

General Wiring Warnings and Precautions

Essential warnings and precautions for all electrical connections and wiring work.

Field Wiring and Component Layouts

Cable specifications, connection terminal blocks, and electronic board layouts.

Room Thermostat and Controller Wiring

Explains wiring methods for room thermostats and controller installation.

Start-Up and Configuration

Unit Configuration and Terms

Introduction to unit configuration, climate curves, and parameter definitions.

DIP Switch and Operating Current Settings

Configuration using DIP switches for unit functions and operating current.

Initial Start-up and Pump Configuration

Steps for initial start-up, pre-operation checks, and pump speed adjustments.

FOR SERVICEMAN Menu Operations

Guide on accessing and navigating the FOR SERVICEMAN menu for advanced settings.

DHW, Cooling, and Heating Mode Settings

Configuration options for DHW, Cooling, and Heating modes, including priority and temperature settings.

Auto Mode, Temperature Type, and Thermostat Settings

Configuring Auto mode, temperature source, and room thermostat settings.

Additional Heating Sources and Holiday Settings

Settings for backup heaters, solar kits, and holiday away/at home functions.

Test Run and Special Functions

Procedures for performing test runs and utilizing special functions like air purge and floor drying.

Parameter Settings for Technicians

Table of parameters reserved for technicians, including codes, states, and default values.

Service Information

Flammable Refrigerant Safety

Critical safety precautions for handling flammable refrigerants during service.

Leak Detection and Refrigerant Handling

Methods for leak detection and procedures for refrigerant removal, charging, and decommissioning.

Maintenance

Electrical Safety and Annual Checks

Critical electrical safety warnings and essential annual maintenance checks.

Unit Disassembly and Safety Valve Replacement

Instructions for disassembling the unit and replacing the safety valve.

Trouble Shooting

General Troubleshooting Guidelines and Symptoms

Initial steps and common symptoms for diagnosing and resolving unit issues.

Unit Performance and Water Flow Issues

Troubleshooting for compressor start, pump noise, and water flow problems.

Heating and DHW Transition Issues

Solutions for issues related to heating capacity shortages and DHW mode transitions.

Error Codes E0-F1

List of common error codes and their corresponding failure causes and corrective actions.

Error Codes H1-P6

Further error codes related to sensors, communication, and module protection faults.

Error Codes Pd-F1

Error codes for condenser temperature, anti-freeze, and voltage issues.

General Technical Data

Unit Specifications and Electrical Data

Summary of unit specifications including dimensions, weight, connections, and electrical data.

Electrical Schema

Electrical Schematics (5;7;9 kW and 12;14;16 kW)

Wiring diagrams for single-phase 5/7/9kW and 12/14/16kW units.

Electrical Schematics (3-Phase)

Wiring diagrams for 3-phase 12/14/16kW units.

Refrigerant Cycle

Refrigerant Circuit Diagram and Components

Visual representation of the refrigerant cycle and identification of system components.

Electronic Board Layout

Hydraulic Module and Inverter PCB Layouts

Layouts of control boards (PCB A, B, C) for different unit models and phases.

Modbus Mapping Table

Modbus Addressing and Parameter Mapping

Explains Modbus communication and maps register addresses to controller functions.

Unit Parameter Mapping Addresses

Lists addresses for checking various unit operating parameters via Modbus.

Modbus Register Mapping (Status and Settings)

Maps register addresses for status bits, parameter settings, and advanced functions.

Controller User Manual

Controller Interface Icons and Keys

Explains controller icons, key functions, and basic interface navigation.

Home Pages and System Diagrams

Displays possible controller home pages and system diagrams for different configurations.

Configuration Modes: Ambient, Default, Weather

Adjusting ambient operating modes, default temperatures, and weather-based temperature settings.

DHW, ECO, and Timer Settings

Configuring Domestic Hot Water functions, ECO mode, and timer schedules.

Child Lock and Service Information

Enabling child lock and accessing service information, error codes, and parameters.

Controller Navigation Menu

Controller Menu Structure Overview

Hierarchical overview of the controller's menu structure and navigation paths.

CLIVET WSAN-YMi Series Specifications

General

Series	WSAN-YMi
Refrigerant	R410A
Compressor Type	Scroll
Power Supply	400V/3Ph/50Hz
Dimensions (LxWxH)	Varies by model, refer to product documentation
Weight	Varies by model, refer to product documentation