Contents Of Remote Controller Switch Alarm Display - Panasonic U-8ME2E8 Service Manual & Test Run Service Manual

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 failure
EEPROM on the main or sub outdoor unit PCB has failed.
Protective Protective device for
device compressor No. 1 is activated.
for compressor
is activated
Protective device for
compressor No. 2 is activated. Compressor No. 2 CT sensor disconnected or short circuit
Oil sensor fault.
(Disconnection, etc.)
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 intake temp. sensor (SCT)
Temp. sensor at refrigerant gas outlet of dual-tube (SCG)
High pressure sensor failure. High pressure trouble.
Low-pressure sensor failure
Outdoor No. 2 coil gas temp. sensor (EXG2)
Outdoor No. 2 coil liquid temp. sensor (EXL2)
Thermal protector in indoor unit fan motor is activated.
Improper wiring connections of ceiling panel.
Float switch is activated.
Faulty drain pump. Drain pump locked.
Operation of protective function of fan inverter.
O sensor (detects low oxygen level) activated
2
Discharge temperature error. (Comp. No. 1)
High pressure switch is activated.
Open phase.DC voltage charge failure (Comp. No. 1)
Open phase.DC voltage charge failure (Comp. No. 2)
Compressor No. 1 over secondary overcurrent.
Discharge temperature error. (Comp. No. 2)
Inverter for compressor No. 2 is unusual.
High load alarm
Outdoor unit fan motor 1 is unusual.
Outdoor unit fan motor 2 is unusual.
Compressor No. 2 over secondary overcurrent.
Inverter for compressor No. 1 is unusual.
When alarm message in other indoor units occurs in case of
group control, unalarmed state of indoor units are inoperative.
Compressor No. 1 current trouble (overcurrent)
Compressor No. 1 CT sensor disconnected
Compressor No. 1 discharge temp. sensor disconnected
Compressor No. 2 current trouble (overcurrent)
Compressor No. 2 discharge temp. sensor disconnected
Abnormal decrease of low-pressure
Low oil alarm
Comp. No. 1 oil sensor
Comp. No. 2 oil sensor
Compressor No. 2 HIC trip (HIC current or temperature).
Compressor No. 1 HIC trip (HIC current or temperature).
6 - 3
2WAY SYSTEM
2WAY SYSTEM
Trouble Diagnosis
Trouble Diagnosis
ON: Blinking: OFF:
Wired
Wireless
remote
remote controller
control
receiver display
display
F12
Operating and timer
F14
lamps blinking
F16
alternately
F17
F23
F24
<<P01>>
Timer and heat
ready lamp blinking
<<P09>>
alternately
<<P10>>
<<P11>>
<<P12>>
P14
P03
P04
P05
P15
Operating and heat
ready lamp blinking
P16
alternately
P17
P19
P20
P22
P24
P26
P29
<P31>
Operating and timer
lamp blinking
F29
simultaneously
Operating and timer
lamp blinking
F31 simultaneously
H01
H03
H05
H11
H13
Timer lamp blinking
H15
H06
H07
H08
H27
H21
H31
6