Error-code hub
Panasonic reports faults through the wireless remote and the indoor unit's LEDs, with the full alphanumeric code retrieved via the remote's diagnostic mode rather than shown continuously. The 55 codes below cover the ClimaPure XZ, EXTERIOS Z and Project Series lines, which share a control platform - a code on one applies to the others.
Unit applicability
This table is sourced for ClimaPure XZ Series. If your unit is a different generation or product line not named here, the same display code may vary by generation.
Common codes first
Ranking basis: we do not have failure-frequency telemetry. These are ordered by breadth of affected systems in the SplitAtlas catalog - the documented product line's published model count, whether the same code appears on more than one product line, and any manual applicability notes we hold. This is a breadth ranking, not a popularity claim.
Panasonic lists F 11 as 4-way valve switching abnormality. This is a refrigerant-system valve/control fault.
Panasonic lists F 16 as total running current protection. The unit has detected a current-protection condition.
Panasonic lists F 17 as indoor standby units freezing abnormality. This is a freeze-protection condition on standby indoor units.
Panasonic lists F 18 as dry circuit blocked abnormality. This is an internal circuit or refrigerant-path diagnostic fault.
Panasonic lists F 87 as control box overheat protection. The outdoor electronics area is protecting itself from overheating.
Panasonic lists F 90 as power factor correction (PFC) circuit protection. This is an outdoor power-electronics protection fault.
Safe first checks
These codes have homeowner-safe steps such as filters, airflow, condensate/drain checks, remote/controller items, or a single safe power reset. If the code returns, stop at the boundary in the card.
Turn the system off and power cycle once if safe. If the breaker trips or the code returns, do not keep resetting it.
Read the full code guideTurn the system off. Make sure the outdoor unit is not covered or blocked, but do not open the control box.
Read the full code guideTurn the system off and power cycle once if safe. Do not open electrical panels or keep resetting the unit.
Read the full code guideTurn the system off and power cycle once if safe. Do not open the outdoor unit or electrical panels.
Read the full code guideUse the Panasonic catalog to connect these manual error codes to current model pages and replacement options.
ClimaPure XZ Series
ClimaPure XZ Series
ClimaPure XZ Series
ClimaPure XZ Series
ClimaPure XZ Series
EXTERIOS Z Series
H 00 means the Panasonic diagnostic memory did not return a stored failure. It is the normal result when no fault is recorded.
Panasonic lists F 11 as 4-way valve switching abnormality. This is a refrigerant-system valve/control fault.
Panasonic lists F 16 as total running current protection. The unit has detected a current-protection condition.
Panasonic lists F 17 as indoor standby units freezing abnormality. This is a freeze-protection condition on standby indoor units.
Panasonic lists F 18 as dry circuit blocked abnormality. This is an internal circuit or refrigerant-path diagnostic fault.
Panasonic lists F 87 as control box overheat protection. The outdoor electronics area is protecting itself from overheating.
Panasonic lists F 90 as power factor correction (PFC) circuit protection. This is an outdoor power-electronics protection fault.
Panasonic lists F 91 as refrigeration cycle abnormality. This is a sealed-system diagnostic fault.
Panasonic lists F 93 as outdoor compressor abnormal revolution. This is a compressor/inverter diagnostic fault.
Panasonic lists F 94 as compressor discharge pressure overshoot protection. This is a compressor pressure-protection fault.
Panasonic lists F 95 as outdoor cooling high pressure protection. This is a pressure-protection fault.
Panasonic lists F 96 as power transistor module overheating protection. This is an inverter power-module overheat fault.
Panasonic lists F 97 as compressor overheating protection. This is a compressor protection fault.
Panasonic lists F 98 as total running current protection. The unit has detected a current-protection condition.
Panasonic lists F 99 as outdoor direct current (DC) peak detection. This is an outdoor inverter/current protection fault.
Panasonic lists H 11 as indoor/outdoor abnormal communication. The unit has detected an abnormality or protection condition and may stop operation to prevent damage.
Panasonic lists H 12 as indoor unit capacity unmatched. The unit has detected an abnormality or protection condition and may stop operation to prevent damage.
Panasonic lists H 14 as indoor intake air temperature sensor abnormality. The unit has detected an abnormality or protection condition and may stop operation to prevent damage.
Panasonic lists H 15 as outdoor compressor temperature sensor abnormality. The unit has detected an abnormality or protection condition and may stop operation to prevent damage.
Panasonic lists H 16 as outdoor current transformer (CT) abnormality. This is an internal diagnostic fault or protection condition.
Panasonic lists H 17 as outdoor suction temperature sensor abnormality. This is an internal diagnostic fault or protection condition.
Panasonic lists H 19 as indoor fan motor mechanism lock. The indoor fan mechanism is not operating as expected.
Panasonic lists H 21 as indoor float switch operation abnormality. The system is seeing an abnormal condensate or float-switch condition.
Panasonic lists H 23 as indoor heat exchanger temperature sensor 1 abnormality. This is an internal diagnostic fault or protection condition.
Panasonic lists H 24 as indoor heat exchanger temperature sensor 2 abnormality. This is an internal diagnostic fault or protection condition.
Panasonic lists H 25 as indoor ion device abnormality. This is an internal diagnostic fault in the air-treatment function.
Panasonic lists H 26 as Minus ION abnormality. This is an internal diagnostic fault in the ion function.
Panasonic lists H 27 as outdoor air temperature sensor abnormality. This is an internal diagnostic fault or protection condition.
Panasonic lists H 28 as outdoor heat exchanger temperature sensor 1 abnormality. This is an internal diagnostic fault or protection condition.
Panasonic lists H 30 as outdoor discharge pipe temperature sensor abnormality. This is a discharge-temperature diagnostic fault and not a homeowner repair.
Panasonic lists H 31 as indoor humidity sensor abnormality. This is an internal diagnostic fault or protection condition.
Panasonic lists H 32 as outdoor heat exchanger temperature sensor 2 abnormality. This is an internal diagnostic fault or protection condition.
Panasonic lists H 33 as indoor/outdoor misconnection abnormality. This points to an installed wiring or connection issue, not a homeowner setting.
Panasonic lists H 34 as outdoor heat sink temperature sensor abnormality. This is an internal diagnostic fault or protection condition.
Panasonic lists H 35 as indoor/outdoor water adverse current abnormality. Treat it as an internal abnormality that needs authorized diagnosis.
Panasonic lists H 36 as outdoor gas pipe temperature sensor abnormality. This is an internal diagnostic fault or protection condition.
Panasonic lists H 37 as outdoor liquid pipe temperature sensor abnormality. This is an internal diagnostic fault or protection condition.
Panasonic lists H 38 as indoor/outdoor mismatch (brand code). The connected equipment is not matching as expected.
Panasonic lists H 39 as abnormal indoor operating unit or standby units. This is a system coordination fault.
Panasonic lists H 41 as abnormal wiring or piping connection. This is an installation or service fault, not a homeowner repair.
Panasonic lists H 50 as ventilation motor abnormality. This is an internal motor fault.
Panasonic lists H 51 as nozzle lock abnormality. This is an internal mechanism fault.
Panasonic lists H 52 as left-right limit switch fixing abnormality. This is an internal louver or limit-switch fault.
Panasonic lists H 58 as indoor gas sensor abnormality. This is an internal sensor fault.
Panasonic lists H 59 as Eco sensor abnormality. This is an internal sensor fault.
Panasonic lists H 64 as outdoor high pressure sensor abnormality. This is a pressure-related safety/protection fault.
Panasonic lists H 67 as nanoe abnormality. This is an internal air-treatment function fault.
Panasonic lists H 70 as light sensor abnormality. This is an internal sensor fault.
Panasonic lists H 71 as DC cooling fan inside control board abnormality. This is an internal board/fan fault.
Panasonic lists H 72 as abnormality tank temperature sensor. This is an internal sensor fault.
Panasonic lists H 79 as Wireless LAN module write error. The network module is not writing data correctly.
Panasonic lists H 81 as outdoor electronic component self-check abnormality. This is an outdoor electronics fault.
Panasonic lists H 85 as abnormal communication between indoor and wireless LAN module. The indoor unit and wireless module are not communicating normally.
Panasonic lists H 97 as outdoor fan motor mechanism lock. The outdoor fan mechanism is not operating as expected.
Panasonic lists H 98 as indoor high pressure protection. This is a pressure-protection condition.
Panasonic lists H 99 as indoor operating unit freeze protection. The indoor coil area may be too cold, so the unit is protecting itself.