Self-Diagnosis - Panasonic CS-C45FFH Service Manual

CS-C45FFH / CU-C45FFH

9 Self-diagnosis

According to the LED on the outdoor PCB, locations of malfunction can be detected. Other than indications below occurring,
switch off the power supply, then switch on to restart the operation.
LEDS ON OUTDOOR PCB
No LED5
1
●
2
●
3
●
4
●
5
6
7
8
9
10
11
●
● LED Flashing
LED4 LED3 LED2 LED1
● ●
●
●
● ●
● ●
● ●
● ●
● ● ●
● ● ●
● ● ●
● ● ●
Blank: OFF
ERROR
Power Supply Phase
Problem
Discharge pressure
protection
Compressor over current
protection
Compressor discharge
temperature protection
Condenser outlet sensor
problem
Compressor discharge
sensor problem
Outdoor ambient air
temperature sensor
problem
Compressor current
detector open circuit
problem
Heating pressure switch
open circuit problem
High pressure switch open
circuit problem
Refrigeration cycle problem
20
CHECK LOCATION
Negative or open phase or
improper connection of main
supply.
Refrigeration cycle
Open phase or lock in
compressor
Insufficient refrigerant
The sensor or the connector
CN-TH(3,4)
The sensor or the connector
CN-DIS
The senor or the connector CN-
TH(1,2)
Open phase of power supply,
compressor current detector
open circuit.
Heating pressure switch or the
connector CN-PSW1
High pressure switch or the
connector CN-PSW2
Insufficient refrigerant or
connector CN-HOT