Flowcharts
Rev A 05/01/01 // SB
190113_A
11
ERROR
CODE
ERROR
CAUSE
ACTION
E 91
No data transmission
from console to central
unit. (Refer to Section
9)
a.)24V supply of console
interrupted.
b.)Interruption or accidental
ground in the line from
console electronics to
central unit.
c.)Transmitter/receiver
module defective.
a.) Check 24V at terminal X1 of
console electronics.
b.) Check the connection
between console electronics and
central unit.
c.) If accidental ground occurs,
the transmitter module in the
console electronics can be
damaged. Replace the console
electronics or main board
respectively.
E92
Error in the data
transmission from
console to central unit.
(Refer to also Section
3.10)
a.) Temporary interruption of
the data line from console
electronics to central unit.
b.) Transmitter/receiver
module defective.
a.) Check the connection
between console electronics and
central unit.
E93
Error in the data
transmission from
central unit to console.
(Refer to also Section
3.10)
a.) Temporary interruption of
the data line from console
electronics to central unit.
b.) Transmitter/receiver
module defective.
Refer to Section 3.10.
a.) Check the connection
between console electronics and
central unit.
b.) Replace console electronics
or main board respectively.
E94
No data transmission
for central unit to
console. (Refer to also
Section 3.10)
a.) Interruption or accidental
ground in the line from
console electronics to
central unit.
b.) Transmitter/receiver
module defective.
c.) Data-EPROM defective.
d.) CPU defective.
e.) Electromagnetic
interference (when switching
contractors or valves)
Refer to Section 3.10.
a.) Check the connection
between console electronics and
central unit. If you find an
accidental ground, the
transmitter module in the console
electronics can be damaged.
Replace the console electronics.
b.) Replace console electronics
or main board respectively.
c.)Check data EPROM.
d.) Replace CPU module. Refer
to Drawing 4 and Procedure 3
Steps 1-3, 13,14.
e.) Eliminate interference source
by inverse diodes or varistors.
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