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Check LED
Check Code
LED2
LED1
RED
GREEN
E6/E7/
2
2
E8/E9
times
times
Conti
Conti
FC
nuous
nuous
blinking
blinking
11
11
Fd
times
times
GHH15010
Abnormal point and
detection method
Communication abnormality
between cylinder unit and outdoor
unit
malfunction detected on cylinder
unit microcomputer and outdoor
unit microcomputer
Abnormality in outdoor unit control
system
on outdoor unit microcomputer
Detection of abnormal AC voltage
voltage to outdoor unit 70 V or
less
*When the earth leakage circuit
breaker of the Cylinder Unit is
turned to "OFF", the LEDs (red,
green) on the outdoor inverter
p.c. board go out. This,
however, takes about 1 minute.
While the LEDs on the outdoor
inverter p.c. board are lit, do not
turn the earth leakage circuit
breaker back on. Doing so
might cause this abnormality to
be detected again.
Case
(1) Defective power transmission
line between cylinder unit and
outdoor unit
a) Not connected
b) Disconnection
c) Defective contact
(2) Defective cylinder unit board
(3) Defective outdoor inverter
p.c. board
(1) Defective outdoor inverter
p.c. board
(1) Low power supply voltage
a) Inappropriate power supply
used
b) Defective power transmission
line
c) Defective power transmission
line connection
(2) Erroneous operation of earth
leakage circuit breaker*
(3) Defective outdoor inverter p.c.
board
16
Judgment and action
(1) Check the power transmis-
sion line between cylinder unit
and outdoor unit
a) Connect power transmission
line
b) Replace power transmission
line
c) Correct power transmission
line connection
(2) Replace cylinder unit board
(3) Replace outdoor inverter p.c.
board
(1) Replace the outdoor inverter
p.c. board
(1) Check the power supply
voltage
a) Use a power supply having the
appropriate voltage
b) Replace the power transmis-
sion line
c) Correct the power transmission
line connection
(2) Perform a reset
(3) Replace the outdoor inverter
p.c. board
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