26
APPENDIX
ENGLISH
Error
code
Error item
Error
grade
Cause
CH10071 Filter change alarm
3
When exceeding the set up value of a differential pressure sensor
CH10072 Filter change error
2
When the accumulated operation hour after filter change alarm
exceeds 300 hours
CH10101
Communication error among IO #1
modules
2
In case communication signal of IO #1 is not continuously received
for more than one minute
CH10111
Communication error among IO #2
modules
2
In case communication signal of IO #2 is not continuously received
for more than one minute
CH10501
Communication error among
Comm #1 modules
2
In case communication signal of COM #1 is not continuously
received for more than one minute
CH10511
Communication error among
Comm #2 modules
2
In case communication signal of COM #2 is not continuously
received for more than one minute
CH11002
ODU1 indoor sensor(entrance pip-
ing) error
2
Disconnected or short-circuited temperature sensor in piping
entrance of the indoor unit No. 1 of COM #1
CH11005
ODU1 communication error (indoor
unit « outdoor unit)
2
In case the indoor unit No. 1 of COM #1 doesn’t continuously
receive outdoor unit’s communication signal for more than 3 min-
utes
CH11006
ODU1 indoor sensor(exit piping)
error
2
Disconnected or short-circuited temperature sensor in piping exit
of the indoor unit No. 1 of COM #1
CH11255
Communication error with ODU1
central control
2
In case the indoor unit No. 1 of COM #1 doesn’t continuously
receive central control’s communication signal for more than 3 min-
utes (an error occurs only when the target temperature control
standard is supply air)
CH11XXX
Display ODU1 outdoor unit error
code as it is
2
When an error occurs in the outdoor unit which communicate with
the indoor unit No. 1 of COM #1
CH12002
ODU2 indoor sensor(entrance pip-
ing) error
2
Disconnected or short-circuited temperature sensor in piping
entrance of the indoor unit No. 2 of COM #1
CH12005
ODU2 communication error (indoor
unit « outdoor unit)
2
In case the indoor unit No. 2 of COM #1 doesn’t continuously
receive outdoor unit’s communication signal for more than 3 min-
utes
CH12006
ODU2 indoor sensor(exit piping)
error
2
Disconnected or short-circuited temperature sensor in piping exit
of the indoor unit No. 2 of COM #1
CH12255
Communication error with ODU2
central control
2
In case the indoor unit No. 2 of COM #1 doesn’t continuously
receive central control’s communication signal for more than 3 min-
utes (an error occurs only when the target temperature control
standard is supply air)
CH12XXX
Display ODU2 outdoor unit error
code as it is
2
When an error occurs in the outdoor unit which communicate with
the indoor unit No. 2 of COM #1
CH13002
ODU3 indoor sensor(entrance pip-
ing) error
2
Disconnected or short-circuited temperature sensor in piping
entrance of the indoor unit No. 3 of COM #1
CH13005
ODU3 communication error (indoor
unit « outdoor unit)
2
In case the indoor unit No. 3 of COM #1 doesn’t continuously
receive outdoor unit’s communication signal for more than 3 min-
utes
CH13006
ODU3 indoor sensor(exit piping)
error
2
Disconnected or short-circuited temperature sensor in piping exit
of the indoor unit No. 3 of COM #1
CH13255
Communication error with ODU3
central control
2
In case the indoor unit No. 3 of COM #1 doesn’t continuously
receive central control’s communication signal for more than 3 min-
utes (an error occurs only when the target temperature control
standard is supply air)
CH13XXX
Display ODU3 outdoor unit error
code as it is
2
When an error occurs in the outdoor unit which communicate with
the indoor unit No. 3 of COM #1
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