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Error
code or
Error contents
message
936.91
Main drive motor
assembly failure
Stall detected during
speed control.
Motor = type 1
937.40
Main drive motor
assembly failure
Over speed detected
during speed control.
Motor = type 0
937.41
Main drive motor
assembly failure
Over speed detected
during speed control.
Motor = type 1
937.50
Main drive motor
assembly failure
Over speed detected
during position
control.
Motor = type 0
Description/Action
The main drive motor assembly
may be faulty or has failed.
The main drive motor assembly
may be faulty or has failed.
The main drive motor assembly
may be faulty or has failed.
The main drive motor assembly
may be faulty or has failed.
7462
Possible repair actions
1. Check all connections on
the system card assembly.
2. Check all connections on
the main drive motor
assembly.
3. Replace the main drive
motor assembly. Go to
"Main drive motor
assembly removal" on
page
4-20.
4. Replace the system card
assembly if problem
remains. Go to
"System
card assembly removal"
on page
4-50.
1. Check all connections on
the system card assembly.
2. Check all connections on
the main drive motor
assembly.
3. Replace the main drive
motor assembly. Go to
"Main drive motor
assembly removal" on
page
4-20.
4. Replace the system card
assembly if problem
remains. Go to
"System
card assembly removal"
on page
4-50.
1. Check all connections on
the system card assembly.
2. Check all connections on
the main drive motor
assembly.
3. Replace the main drive
motor assembly. Go to
"Main drive motor
assembly removal" on
page
4-20.
4. Replace the system card
assembly if problem
remains. Go to
"System
card assembly removal"
on page
4-50.
1. Check all connections on
the system card assembly.
2. Check all connections on
the main drive motor
assembly.
3. Replace the main drive
motor assembly. Go to
"Main drive motor
assembly removal" on
page
4-20.
4. Replace the system card
assembly if problem
remains. Go to
"System
card assembly removal"
on page
4-50.
2-101
Diagnostic information
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