Panasonic U-4LE2E5 Service Manual & Test Run Service Manual page 131

1. Contents of Remote Controller
1. Contents of Remote Controller
Switch Alarm Display
Switch Alarm Display
Thermistor fault Outdoor thermistor is either
open or damaged.
Activation of Protective device in indoor
protective unit is activated.
device
Protective device in outdoor
unit is activated.
Indoor unit communication
error of group control wiring.
EEPROM on indoor unit PCB has failure.
EEPROM on outdoor unit PCB has failure.
Protective Protective device for
device compressor is activated.
for compressor
is activated
Low pressure sensor value is too low.
Abnormal device function
<< >> alarm indication: Does not affect the operation of other indoor units.
< > alarm indication: In some cases may affect the operation of other indoor units.
Possible cause of malfunction
Compressor inlet temperature sensor has failure. (SCT)
Subcooling heat exchanger temperature sensor has failure.
(SCG)
High pressure sensor has failure. (HPS)
Low pressure sensor has failure. (LPS)
Thermal protector for Indoor unit fan motor is activated.
Connection to the panel of indoor unit is not good.
Float switch of drain pan safety is activated.
Drain pump failure or locked rotor.
Indoor unit fan inverter protection control is activated.
O sensor has activated.
2
Compressor discharge temperature is too high.
High pressure swich is activated.
AC power supply has abnormal.
Compressor secondary current is overcurrent.
Too high load in refrigerant circuit.
Outdoor unit fan motor has failure.
Compressor start failure. Compressor is missing phase or
reverse phase.
Other indoor unit in group control has an alarm.
Compressor primary current is overcurrent.
PFC is overcurrent or VDC is overvoltage. (Single phase only)
Compressor current sensor is disconnected or shorted.
Compressor discharge temperature sensor is
disconnected, shorted or misplaced. (DISCH)
Compressor HIC has failure. HIC is overcurrent or
overheat. VDC is undervoltage or overvoltage.
6 - 3
2WAY SYSTEM
Mini VRF SYSTEM
Trouble Diagnosis
Trouble Diagnosis
ON: Blinking: OFF:
Wired
Wireless
remote
remote controller
control
receiver display
display
F12
Operating and timer
F14
lamps blinking
alternately
F16
F17
<<P01>>
Timer and heat
ready lamp blinking
<<P09>>
alternately
<<P10>>
<<P11>>
<<P12>>
P14
P03
P04
P05
P16
Operating and heat
P20 ready lamp blinking
alternately
P22
P29
<P31>
Operating and timer
lamp blinking
F29
simultaneously
Operating and timer
lamp blinking
F31 simultaneously
H01
H02
H03
Timer lamp blinking
H05
H06
H31
6