In brief
Fault code 19 on Hitachi Wall Mounted / Cassette means: Fault code 19 appears when the indoor fan motor does not send a rotation signal back to the main PCB after the start command. Most common cause: Seized fan motor, turbine blocked by an object, disconnected connector, or faulty electronic PCB (motor control circuit). First action: Try turning the turbine by hand (with power off). It should rotate freely.. Call a registered engineer if the fault returns after basic checks or involves refrigerant work (F-Gas registered engineer required).
According to the Hitachi Indoor Unit Service Manual, fault code 19 is triggered when the indoor fan motor fails to return a rotation signal to the main PCB after the start command.
19 • Hitachi • Wall Mounted / Cassette
Fault Code 19 Hitachi: Indoor Fan Motor
Fault code 19 appears when the indoor fan motor does not send a rotation signal back to the main PCB after the start command.
Source: Hitachi Indoor Unit Service Manual
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What does fault code 19 on Hitachi mean?
Fault code 19 appears when the indoor fan motor does not send a rotation signal back to the main PCB after the start command.
Seized fan motor, turbine blocked by an object, disconnected connector, or faulty electronic PCB (motor control circuit).
Symptoms
- No air flow
- The louvre opens then the unit stops
- Straining motor noise
Diagnosis
1. Manual rotation check
- Try turning the turbine by hand (with power off). It should rotate freely.
2. DC motor voltage check
- Check the motor supply voltage (310V DC) on the PCB.
How to reset fault code 19 on Hitachi?
Replace the fan motor. If the new motor does not work, replace the indoor PCB.
When should you call an F-Gas engineer?
Fault code 19 most often occurs during air conditioning operation, particularly on wall-mounted / cassette units. No air flow.
Field context
Fault code 19 most often occurs during air conditioning operation, particularly on wall-mounted / cassette units. No air flow.
Frequently asked questions
What does fault code 19 mean?
Fault code 19 appears when the indoor fan motor does not send a rotation signal back to the main PCB after the start command.
What is the most common cause of code 19?
Seized fan motor, turbine blocked by an object, disconnected connector, or faulty electronic PCB (motor control circuit).
How do I diagnose code 19 in the field?
Manual rotation check: Try turning the turbine by hand (with power off). It should rotate freely.
How do I resolve fault code 19?
Replace the fan motor. If the new motor does not work, replace the indoor PCB.
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