Toshiba DP-5550, Руководство по обслуживанию, Страница: 280 / 404

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Relation between IH status signal and IH errors (L: Low level, H: High level)
Checking
timing
Signal
Status Error code
Counter
(08-400)
IHERR1 IHERR2 IHERR3
Front cover
(upper) is
closed at
power ON
L L L Abnormality detected at
initialization
* An abnormal status is
detected at the
initialization.
C471 11
On usual Power voltage abnormality
* AC power is not
supplied to the IH
board.
C472 12
L L H Power voltage upper limit
abnormality (Surge
detection)
* AC input voltage has
exceeded 122% of the
rated voltage
C473 13
L H L Switching element (IGBT)
abnormality
* Wire breakings, short-
circuits abnormal
fluctuations or
overheating (=
insufficient cooling) of
IGBT
C481 14
L H H IH abnormality C480 15
H L L No abnormality - -
H H H Power voltage lower limit
detection (not error)
* AC input voltage has
dropped to less than
85% of rated voltage
- -
H H L Input current lower limit
abnormality
* Wire breakings or
improper installation of
IH coil
C490 17
H H H Power voltage lower limit
abnormality
* AC input voltage has
dropped to less than
75% of rated voltage
C474 16
Front cover
(upper) is
opened
L L X
(Other than the above)
Power voltage abnormality
when the front cover
(upper) is opened
* An abnormal status is
detected when the
cover is opened
C475 10