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6-4 l Troubleshooting
How to Identify the Cause of a
Problem
Most heater malfunctions are indicated by an illuminated Alarm light on the HTC
process air heater control panel.
A problem can trigger two types of alarms:
• Shut Down: The heater has automatically shut down because it detected a
serious problem that could damage your material or dryer.
• Passive: The heater continues to operate, but warns of a problem that could
prevent correct heating of your material. If ignored, this problem could lead to
a condition that will shut down the dryer.
When the alarm light is displayed:
1 Press the Acknowledge Alarm button to silence the alarm (see page
4-2).
2 Find the error message in the diagnostics table of this Troubleshooting
section.
3 Cyc
le the heater switch from Enable to Standby and then back to
Enable to clear and restart normal control. If the alarm reappears, the
problem was not fixed.
Heaters
Startup /
Shutdown
For Startup:
1. With heaters in
Standby, turn on
blower or dryer.
2. Enable heaters.
For Shutdown:
1. Switch heaters to
Standby.
2. Wait 60 seconds
before turning off
blower or dryer.
Enable
Standby
Alarm Light
Acknowledge Alarm
Button