Panasonic CS-E9SD3UAW Service Manual page 71

Diagnosis
Abnormality / Protection control
display
F98 Total running current protection
Outdoor Direct Current (DC) peak
F99
detection
Note:
"O" - Frequency measured and fan speed fixed.
The memory data of error code is erased when the power supply is cut off, or press the Auto Switch until "beep"
sound heard following by pressing the "CHECK" button at Remote Control.
Although operation forced to stop when abnormality detected, emergency operation is possible for certain errors
(refer to Error Codes Table) by using Remote Control or Auto Switch at indoor unit. However, the Remote Control
signal receiving sound is changed from one "beep" to four "beep" sounds.
Abnormality Emergency
Judgment Operation
3 times occurrence
within 20 minutes
7 times occurrence
continuously
71
Primary location to verify
 Excess refrigerant
─
 Improper heat radiation
 Outdoor PCB
 IPM (Power transistor)
─
 Compressor