Haier HSU19K-PYSG5BN-INV device hub
Use this device hub to troubleshoot Haier HSU19K-PYSG5BN-INV (Air Conditioner). Start with the most common codes and compare the published fix paths before opening parts.
Try E2, temperature, or won’t start.
Open the highest-signal error pages for this device first when you already know the code family.
Let the published patterns narrow you into the right branch before you open parts or call support.
Use the full code directory when the display is clear and you want the exact route fast.
Most common error codes
Start here when you want the shortest path from this device hub to the exact troubleshooting page.
Haier HSU19K-PYSG5BN-INV error code F9 means module reset. This guide explains the likely causes, the safest f
Haier HSU19K-PYSG5BN-INV error code F7 means suction temperature sensor failure. This guide explains the likel
Haier HSU19K-PYSG5BN-INV error code F4 means compressor discharging temperature protection. This guide explain
Haier HSU19K-PYSG5BN-INV error code F3 means communication error between power module and main PCB board. This
Haier HSU19K-PYSG5BN-INV error code F23 means compressor U-phase overcurrent. This guide explains the likely c
Haier HSU19K-PYSG5BN-INV error code F2 means instantaneous over-current protection of the compressor. This gui
Haier HSU19K-PYSG5BN-INV error code F19 means power over/under voltage protection. This guide explains the lik
Haier HSU19K-PYSG5BN-INV error code E9 means indoor unit overload in heating mode. This guide explains the lik
Need more help with this model?
Use the exact error page when you know the code. Otherwise stay in this device hub to compare the most likely routes first, then branch into the fix that matches the symptom.
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Common troubleshooting themes
These patterns are derived from the currently published fixes for this model and help you pick the right route faster.
Recently updated fixes
Fresh pages first — useful when you’re troubleshooting right now.
Haier HSU19K-PYSG5BN-INV error code F9 means module reset. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Haier HSU19K-PYSG5BN-INV error code F9 means module reset. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Haier HSU19K-PYSG5BN-INV error code F7 means suction temperature sensor failure. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Haier HSU19K-PYSG5BN-INV error code F7 means suction temperature sensor failure. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Haier HSU19K-PYSG5BN-INV error code F6 means outdoor ambient sensor failure. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Haier HSU19K-PYSG5BN-INV error code F4 means compressor discharging temperature protection. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Haier HSU19K-PYSG5BN-INV error code F4 means compressor discharging temperature protection. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Haier HSU19K-PYSG5BN-INV error code F3 means communication error between power module and main PCB board. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
All error codes
Pick your code to open the fix page, or use the main search to filter by symptom or keyword.
About this device hub
If your device shows an error code, start with the matching fix page. When a code returns repeatedly, it often points to an underlying cause (temperature, power delivery, sensors, locks, or wear).
Always follow basic safety: unplug before opening anything, and stop if you smell burning or see damage.