4–11Troubleshooting
Ham. Bank Hot
Hmr Coil Too Hot
NOTE: The printer has protective circuits designed to sense conditions that
can lead to overheating. When such conditions are sensed, print
speed is reduced 50%. If the printer consistently prints at half speed,
it may be printing long jobs of very dense graphics or operating in a
severe environment. A severe environment is consistently above 90°
Fahrenheit (32° Celsius) or is dirty enough to create blockage of the
blower ducts. If the printer is located in such an environment,
consider relocating it to a cooler, cleaner area or reducing the size
and duration of the print jobs.
Instruction Indication Yes No
1. Press the control panel
switch that clears fault
indications.
The printer continues the print
job.
No further
attention required.
The printer
continues original
print job, then the
fault message
reappears.
2. Check the ambient
temperature where the printer
is operated.
Printer area at or above 100° F
(37° C).
Allow hammer
bank to cool for 10
minutes. Cool
printer area or
reduce size and
duration of print
jobs.
Go to step 3.
3. Run a diagnostic self–test
(page 4–37). While test is
running, check operation of
blower fan and air flow
through blower duct.
Unobstructed air flow through
blower duct.
Go to step 4. If blower duct was
blocked, remove
obstructions. If
blower fan did not
operate, check
electrical
connections. If
connections are
okay, replace the
blower assembly.
4. Cool the hammer bank for 2
hours. (It must be at room
temperature.) Run a
diagnostic self–test (page
4–37).
“Ham. Bank Hot”
or
“HMR COIL TOO HOT”
message.
Replace the
hammer bank.
Return the printer
to normal
operation.
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