Hitachi RPC-4.0FSR Operation Manual

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A10762290A

Operation

Manual

INVERTER-DRIVEN

MULTI-SPLIT SYSTEM

HEAT PUMP

AIR CONDITIONERS

Type Model

Ceiling

RPC-1.5FSR

RPC-2.0FSR

RPC-2.5FSR

RPC-3.0FSR

RPC-4.0FSR

RPC-5.0FSR

RPC-6.0FSR

IMPORTANT:

READ AND UNDERSTAND

THIS MANUAL BEFORE

USING THIS HEAT PUMP

AIR CONDITIONERS.

KEEP THIS MANUAL FOR

FUTURE REFERENCE.

Table of Contents

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Technical Catalogue88 pages

Installation & Maintenance Manual52 pages

Questions and Answers:

R
Richard ObrienAug 13, 2025
Why does my Hitachi RPC-4.0FSR Air Conditioner operation stop?
- M
  Michael WilliamsAug 13, 2025
  The Hitachi Air Conditioner might stop operating due to several reasons: * The micro-computer may be activated to protect the device from electromagnetic waves. In this case, restart the operation. * If “Motion Sensor ON” is enabled on the wired controller, the unit might stop if the sensor detects absence for a prolonged period, especially if set to “If absent: OFF”. This will stop all indoor units connected to the same wired controller. * Following a power failure, the unit should restart automatically if the failure lasts less than 2 seconds. Otherwise, manually restart the operation.
M
melissa42Aug 16, 2025
Why is the temperature irregular in my Hitachi RPC-4.0FSR?
- B
  Bill MillsAug 16, 2025
  The air flow volume and temperature may be irregular due to structural factors like the size of the air outlet and the location of the heat exchanger.
M
Melissa JordanAug 20, 2025
What to do if my Hitachi Air Conditioner has an odor?
- S
  Stacey BrownAug 20, 2025
  If you notice an odor coming from your Hitachi Air Conditioner, it might be due to smells like cigarette smoke or other room odors that have been absorbed inside the unit. To resolve this: * Ventilate the room well while running the unit in fan mode. * Clean the air filter, air outlet, and air inlet grille.
T
Tracy HuynhAug 25, 2025
Why is there mist coming from my Hitachi Air Conditioner indoor unit?
- J
  Jason MiddletonAug 25, 2025
  Mist coming from your Hitachi Air Conditioner's indoor unit can occur for several reasons: * **In restaurants or kitchens:** Oil attached to the fins might decrease heat exchange efficiency. * **During dry operation:** The air outlet temperature might become too low; try changing the operation mode. * **During cooling operation in humid environments:** The air outlet temperature might be too low; raise the set temperature and the air flow volume. * **During FrostWash:** Frost may form on the fins of the heat exchanger.
J
James LittleAug 28, 2025
Why is my Hitachi RPC-4.0FSR making sounds?
- R
  Rebecca NormanAug 28, 2025
  Your Hitachi Air Conditioner may produce various sounds during operation: 1. A grate sound when starting or stopping is normal; it's due to components rubbing as resin parts expand and contract with temperature changes. 2. The sound of water flowing or burbling during operation is the refrigerant flowing or the drain-up mechanism draining water, especially noticeable when starting or stopping the compressor (for about 3 minutes). 3. A growling sound may occur temporarily after changing the air flow volume because the fan motor makes a temporary sound when the fan speed changes. 4. Crackling sounds or the sound of frost melting during FrostWash are normal, caused by the heat exchanger fins freezing and thawing and the extension and contraction of resin parts due to temperature changes.
M
millernicoleAug 31, 2025
Why is there dew condensation on my Hitachi Air Conditioner indoor unit?
- J
  Jessica GonzalezAug 31, 2025
  Dew condensation on your Hitachi Air Conditioner's indoor unit can occur due to: * Operating the unit in a humid place (relative humidity around 80%) for an extended period. * During or after FrostWash, especially in humid (around 80% relative humidity) and high-temperature environments (above 30°C).
A
Annette BrownSep 4, 2025
Why is there white steam from my Hitachi Air Conditioner indoor unit?
- M
  Melissa PattonSep 4, 2025
  White steam from the Hitachi Air Conditioner's indoor unit might appear during the defrosting operation when the unit is in heating mode.
J
Jeremiah SmithSep 8, 2025
Why is there white smoke from my Hitachi RPC-4.0FSR indoor unit?
- D
  dpowersSep 8, 2025
  White smoke from the Hitachi Air Conditioner's indoor unit may occur at the beginning of the heating season. This can happen when dust attached to the heat exchanger dries out.

Hitachi RPC-4.0FSR Specifications

General

Brand	Hitachi
Model	RPC-4.0FSR
Category	Air Conditioner
Language	English

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