3
- 2
2-WAY MULTISET VRF SYSTEM
Trouble Diagnosis
3
3 -
2
1. Contents of Remote Controller Switch Alarm Display
Remote controller is
detecting error signal from
indoor unit.
Indoor unit is detecting error
signal from outdoor unit.
Outdoor unit is detecting error
signal from indoor unit.
Improper setting
Improper setting
Indoor unit communication
error of group control wiring.
During auto. address setting,
number of connected units
does not correspond to
number set.
Improper setting
<E01>
<E02>
E06
<<E03>>
E04
<<E08>>
<<E09>>
E12
E18
E15
E16
E20
E24
E25
E26
E29
<L03>
<<L02>>
L05
L06
L07
L08
<<L09>>
L17
Indoor unit is detecting error signal from remote controller and system controller.
Outdoor system address, indoor unit address, or indoor unit
address independent/main/sub unit setting has not been made.
Error in receiving serial communication signal.
(Signal from main indoor unit in case of group control)
(Auto address is not completed.)
Error in transmitting serial communication signal.
indoor units does not correspond to the number set. (Except R.C.
address is “0.”)
Group wiring failure of indoor units in the refrigerant system
(occurring when remote controller is operated immediately after
automatic address setting)
Indoor unit address setting is duplicated.
Error of main indoor unit in receiving serial communication signal
from sub indoor units.
Duplicated remote controller “main” setting.
power is ON.
Automatic address setting start is prohibited.
AP pin was short-circuited at time when automatic address setting
was started.
Number of connected indoor units is less than the number set.
Number of connected indoor units is more than the number set.
Duplicated outdoor unit address.
Mismatch in “No. of outdoor units” setting.
Error of sub outdoor unit in receiving serial communication signal
from main outdoor unit.
Duplication of main indoor unit address setting in group control.
Group control wiring is connected to individual control indoor unit.
Indoor unit address is not set.
Capacity code of indoor unit is not set.
Duplicated indoor unit priority (priority indoor unit).
outdoor unit.
Duplicated indoor unit priority (non-priority indoor unit) and
No indoor unit is connected during auto. address setting.
Main outdoor unit is detecting error signal from sub outdoor unit.
Mismatch of outdoor unit type.
Serial
communication
errors
Mis-setting
Continued
Connected indoor unit is not a multi unit.
L04
Duplication of outdoor R.C. address setting.
Capacity code of outdoor unit is not set.
L10
Operating
lamp blinking
Operating
lamp blinking
Heating ready
lamp blinking
Operating and heating
ready lamps blinking
simultaneously
Operating and heating
ready lamps blinking
simultaneously
Heating ready
lamp blinking
Error in receiving serial communication signal.
When turning on the power supply, the number of connected
Error in receiving serial communication signal.
There is an indoor unit which does not send signals when the
Wired
remote
control
display
Wireless
remote controller
receiver display
ON:
Operation
T
imer
Standby
for heating
Blinking:
OFF:
Possible cause of malfunction
Indoor unit
Thermistor
fault
<<F01>>
<<F02>>
<<F10>>
<<F11>>
Indoor coil temp. sensor (E1)
Indoor coil temp. sensor (E3)
Indoor suction air (room) temp. sensor
Indoor discharge air temp. sensor
Operating and timer
lamps blinking
alternately
