What causes excessively low pressure difference in my Hitachi RAS-5HVRNME-AF Air Conditioner?
Excessively low pressure difference in your Hitachi Air Conditioner is caused when the pressure ratio calculated from high pressure (Pd) and low pressure (Ps) is lower than 1.8 MPa during 3 minutes.
Why does my Hitachi Air Conditioner show a power phase detection abnormality?
A power phase detection abnormality in Hitachi Air Conditioner indoor units can be caused by an open phase in the power source wiring.
What causes suction pressure decrease prevention to activate in my Hitachi Air Conditioner?
Activation of suction pressure decrease prevention in your Hitachi Air Conditioner can be caused by a shortage or leakage of refrigerant, piping clogging, a close-locked expansion valve, or a locked fan motor.
What causes heating overload in my Hitachi RAS-5HVRNME-AF Air Conditioner?
Heating overload in your Hitachi Air Conditioner can be caused by outdoor heat exchanger clogging or short circuit, or an expansion valve close-locked.
What causes failure of refrigerant evaporation temperature thermistor in my Hitachi RAS-5HVRNME-AF?
Failure of the refrigerant evaporation temperature thermistor in your Hitachi Air Conditioner is caused if the refrigerant evaporation temperature thermistor is short-circuited or cut.
What causes failure of suction gas pressure sensor in my Hitachi Air Conditioner?
Failure of the suction gas pressure sensor in your Hitachi Air Conditioner is caused if the low pressure sensor is short-circuited or cut.
What causes Opentherm communication failure in my Hitachi Air Conditioner?
Opentherm communication failure in your Hitachi Air Conditioner is caused if there is no Opentherm communication for a continuous period of 1 minute.
What causes RF communication failure in my Hitachi Air Conditioner?
RF communication failure in your Hitachi Air Conditioner happens when there is no communication for 1 hour with one or two RF receivers which are bound to the RF-Bridge.
What causes transmission error between central and indoor communication in my Hitachi Air Conditioner?
A transmission error between central and indoor communication in your Hitachi Air Conditioner can be caused by an indoor fuse meltdown, or indoor/central connection wiring issues (breaking, wiring error, etc.).
What causes inverter fin temperature abnormality in my Hitachi Air Conditioner?
An inverter fin temperature abnormality in your Hitachi Air Conditioner can be caused by a fin thermistor abnormality, heat exchanger clogging, or fan motor abnormality.
General| Brand | Hitachi |
|---|---|
| Model | RAS-5HVRNME-AF |
| Category | Air Conditioner |
| Language | English |
Overview of safety precautions and warnings for operating the unit.
Key information regarding product compatibility, specifications, and contact.
Details on how the YUTAKI S/S80 heat pumps work and their benefits.
Pre-operation checks and essential steps before starting the system.
Explanation of the system's built-in automatic control functions.
Common issues and initial steps for resolving them.
Identification of outdoor unit parts and diagram of the refrigerant cycle.
Procedures for installing outdoor units, including space and site preparation.
Details on piping, connections, brazing, charging, and vacuum procedures.
Procedures for drain piping, general electrical checks, and wiring connections.
Steps for performing test runs from both indoor and outdoor units.
Safety summaries, control device settings, and troubleshooting guide.
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