In brief
Fault code H64 on Panasonic AQUAREA L R290 generation HYDROBOX series service manual — p means: Fault code H64 indicates an outdoor high-pressure anomaly detected when the sensor signal is 0 Vdc or 5 Vdc. This detection occurs after 1 minute of compressor operation and triggers unit shutdown if the anomaly persists 4 times within 120 minutes. Most common cause: The main cause is a faulty connection of connector CN-HPS, a defective outdoor high-pressure sensor, or a defective main outdoor PCB. First action: Isolate the power supply before any work.. Call a registered engineer if the fault returns after basic checks or involves refrigerant work (F-Gas registered engineer required).
According to the Panasonic service manual, the unit stops if the anomaly is detected 4 times within a 120-minute period (Extract 2).
H64 • Panasonic • AQUAREA L R290 generation HYDROBOX series service manual — p
Panasonic fault code H64: causes, diagnosis and solution
Fault code H64 indicates an outdoor high-pressure anomaly detected when the sensor signal is 0 Vdc or 5 Vdc. This detection occurs after 1 minute of compressor operation and triggers unit shutdown if the anomaly persists 4 times within 120 minutes.
Source: Panasonic documentation (service manual – according to product reference)
Équipe Ask Marcel
Techniciens CVC certifiés
Rédaction et validation terrain par des installateurs PAC, clim et chauffage. Données croisées avec plus de 50 000 fiches pannes documentées.
What does fault code H64 on Panasonic mean?
Fault code H64 indicates an outdoor high-pressure anomaly detected when the sensor signal is 0 Vdc or 5 Vdc. This detection occurs after 1 minute of compressor operation and triggers unit shutdown if the anomaly persists 4 times within 120 minutes.
The main cause is a faulty connection of connector CN-HPS, a defective outdoor high-pressure sensor, or a defective main outdoor PCB.
Symptômes
- Unit shutdown after 4 anomaly detections within 120 minutes
- OFF/ON control panel LED flashing
- Display of fault code H64
- Sensor signal of 0 Vdc or 5 Vdc during operation
Diagnostic
1. Check connection and continuity
- Isolate the power supply before any work.
- Inspect connector CN-HPS for correct connection.
- Measure continuity between pin 1 and 3 (GND) and between pin 1 and 4 (5 V) after disconnecting the PCB.
2. Voltage measurement and validation
- Reconnect the high-pressure sensor to the outdoor PCB.
- Switch on the power supply and run the system.
- Measure the DC voltage between pin 1 and 3 (GND) of connector CN-HPS.
How to reset fault code H64 on Panasonic?
If the connection is poor, correct it. If the voltage is 0 Vdc or 5 Vdc with no continuity, replace the high-pressure sensor. If continuity is absent but the sensor works, or if a PCB fault is detected, replace the main outdoor PCB.
When should you call an F-Gas engineer?
This code occurs during heating or cooling mode operation. The installer must intervene after 1 minute of compressor run time. If the signal remains abnormal (0V or 5V) for 5 consecutive seconds, the error counter starts. The unit only shuts down permanently after 4 detections within 120 minutes.
Affected models
- Panasonic AQUAREA L R290 generation HYDROBOX series
Field context
This code occurs during heating or cooling mode operation. The installer must intervene after 1 minute of compressor run time. If the signal remains abnormal (0V or 5V) for 5 consecutive seconds, the error counter starts. The unit only shuts down permanently after 4 detections within 120 minutes.
Technical source data
Fault code H64 signals an outdoor high-pressure anomaly when the sensor signal is at 0 Vdc or 5 Vdc. Detection occurs after 1 minute of compressor operation (Extract 2). The unit stops if the anomaly is detected 4 times within a 120-minute period (Extract 2), although the manual also mentions a 20-minute threshold for anomaly judgment (Extract 1). Causes include a faulty connection of connector CN-HPS, a defective sensor, or a defective main outdoor PCB. The troubleshooting procedure requires checking continuity between pins 1 & 3 (GND) and 1 & 4 (5 V) of connector CN-HPS on the PCB before measuring voltage during operation (Extract 1).
Sources: Panasonic AQUAREA L R290 generation HYDROBOX series service manual — panasonic-aquarea-l-r290-generation-hydrobox-series-service-manual.pdf (p. 206) · Panasonic AQUAREA L R290 generation HYDROBOX series service manual — panasonic-aquarea-l-r290-generation-hydrobox-series-service-manual.pdf (p. 170)
Questions fréquentes
What are the exact conditions for triggering fault code H64?
Fault code H64 triggers when the outdoor high-pressure sensor signal is 0 Vdc or 5 Vdc. This anomaly must persist for 5 consecutive seconds after the compressor has run for 1 minute. The unit only stops if this condition is detected 4 times within a 120-minute period (Extract 2).
What is the continuity check procedure for the sensor?
To check the sensor, isolate the power supply and disconnect connector CN-HPS from the main outdoor PCB. Measure continuity between pin 1 and pin 3 (GND), then between pin 1 and pin 4 (5 V). If continuity is absent, the sensor or PCB is suspected (Extract 1).
How do you distinguish a sensor fault from a PCB fault?
If continuity is absent between pins 1-3 and 1-4, but the high-pressure sensor works correctly, the cause is a faulty main outdoor PCB. Conversely, if continuity is absent and the sensor is defective, replace the sensor. A poor connection should be corrected first (Extract 1).
Besoin d'aide pour ce diagnostic ?
Marcel analyse vos codes erreur et vous guide pas à pas avec des réponses sourcées.
