51
Reference Manual
24625020, Rev AA
March 2017
Section 6
Electronics
Servicing
6.1
Fault diagnosis
Electrical and electronic faults in the Hydratect 2462 system are indicated by the LEDs on
the front panel and by the fault and status output.
are lists of faults
and fault symptoms that can be diagnosed from these LED indications.
lists the test point values for a serviceable logic card (24620502). The test points
are located on PL206 (Channel 1) and PL406 (Channel 2). The logic card is not functioning
correctly if measured values are very different from values in
Table 6-1. Water-normal Faults and Fault Symptoms
Table 6-2. Steam-normal Faults and Fault Symptoms
Fault summary
Front panel LEDs
Output relays
!
Steam Water
Fault
Status normal
Power supply loss
Off
Off
Off
De-energized
De-energized
Electrode contaminated or short-circuited
On
Off
On
De-energized
Energized
Connection to electrode sense element broken
On
Off
On
De-energized
Energized
Connection to electrode ground broken
On
Off
On
De-energized
Energized
Connection to ground sense broken (electrode in water)
On
Off
On
De-energized
Energized
Connection to ground sense broken (electrode in steam)
On
On
Off
De-energized
De-energized
Fault summary
Front panel LEDs
Output relays
!
Steam Water
Fault
Status normal
Power supply loss
Off
Off
Off
De-energized
De-energized
Electrode contaminated or short-circuited
On
Off
On
De-energized
De-energized
Connection to electrode sense element is broken
On
Off
On
De-energized
De-energized
Connection to electrode ground is broken
On
Off
On
De-energized
De-energized
Connection to ground sense broken (electrode in water)
On
Off
On
De-energized
De-energized
Connection to ground sense broken (electrode in steam)
On
On
Off
De-energized
Energized
Summary of Contents for Mobrey Hydratect 2462
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Page 16: ...10 Reference Manual 24625020 Rev AA Introduction March 2017 Introduction ...
Page 52: ...46 Reference Manual 24625020 Rev AA System Testing March 2017 System Testing ...
Page 62: ...56 Reference Manual 24625020 Rev AA Electronics Servicing March 2017 Electronics Servicing ...
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