Diagnosis

Abnormality /

Abnormality

Protection

Problem

display

Protection control

Judgment

Operation

 

H98

Indoor high pressure

Indoor high pressure

protection

protection (Heating)

 

 

 

 

 

 

 

 

H99

Indoor operating unit

Indoor freeze protection

freeze protection

(Cooling)

 

 

 

 

 

 

 

 

 

4-way valve

4 times happen

 

4-way valve switching

F11

switching

within 30 minutes

abnormal

 

abnormality

 

 

 

 

 

 

 

 

 

Wrong wiring and

F17

Indoor standby units

3 times happen

 

connecting pipe, expansion

valve leakage, indoor heat

freezing abnormality

within 40 minutes

 

 

exchanger sensor open

 

 

 

 

 

 

 

 

circuit

 

 

 

 

 

 

Power factor

 

 

 

F90

correction

4 times happen

Power factor correction

(PFC) circuit

within 10 minutes

circuit abnormal

 

 

 

protection

 

 

 

F91

Refrigeration cycle

2 times happen

Refrigeration cycle

abnormality

within 20 minutes

abnormal

 

 

F93

Compressor

4 times happen

Compressor abnormal

abnormal revolution

within 20 minutes

revolution

 

 

 

Compressor

4 times happen

 

Compressor discharge

F94

discharge overshoot

within 30 minutes

pressure overshoot

 

protection

 

 

 

 

 

F95

Outdoor cooling high

4 times happen

Cooling high pressure

pressure protection

within 20 minutes

protection

 

 

 

Power transistor

4 times happen

 

Power transistor module

F96

module overheating

within 30 minutes

overheat

 

protection

 

 

 

 

 

 

Compressor

3 times happen

 

 

F97

overheating

Compressor overheat

within 30 minutes

 

protection

 

 

 

 

 

 

F98

Total running current

3 times happen

Total current protection

protection

within 20 minutes

 

 

 

 

 

 

 

 

 

Outdoor direct

Continuous

 

Power transistor module

F99

current (DC) peak

happen for 7 times

current protection

 

detection

 

 

 

 

 

Check location

šCheck indoor heat exchanger

šAir filter dirty

šAir circulation short circuit

šCheck indoor heat exchanger

šAir filter dirty

šAir circulation short circuit

š4-way valve

šLead wire and connector

šCheck indoor/outdoor connection wire and pipe

šIndoor heat exchanger sensor lead wire and connector

šExpansion valve lead wire and connector

šOutdoor PCB faulty

šInsufficient refrigerant or valve close

šPower transistor module faulty or compressor lock

šCheck refrigeration system

šCheck refrigeration system

šOutdoor air circuit

šPCB faulty

šOutdoor air circuit (fan motor)

šInsufficient refrigerant

šCheck refrigeration system

šPower source or compressor lock

šPower transistor module faulty or compressor lock

54

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Panasonic CU-XE9PKUA, CS-XE12PKUA, CS-XE9PKUA, CU-XE12PKUA manual Diagnosis Abnormality Protection Problem

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