Mitsubishi Electric QUHZ-W40VA, Руководство по обслуживанию

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GHH15010
16
Abnormal point and
detection method
Case Check Code
Check LED
LED2
RED
LED1
GREEN
Judgment and action
Fd
(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
*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.
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voltage to outdoor unit 70 V or
less
Detection of abnormal AC voltage
(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
E6/E7/
E8/E9
Conti
nuous
blinking
Conti
nuous
blinking
FC
(1) Defective outdoor inverter
p.c. board
Abnormality in outdoor unit control
system
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on outdoor unit microcomputer
(1) Replace the outdoor inverter
p.c. board
(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
Communication abnormality
between cylinder unit and outdoor
unit
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malfunction detected on cylinder
unit microcomputer and outdoor
unit microcomputer
(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
2
times
2
times
11
times
11
times