STP SERIES Install, Operation, and Maintenance Manual
SECTION 5: TROUBLESHOOTING
Rev-1
Diversified Heat Transfer, Inc.
•
439 Main Road, Route 202
•
Towaco, New Jersey 07082
Page
79
of
97
STP Manual
PHONE: 800-221-1522
•
WEBSITE: www.dhtnet.com
09/11/2019
Controller unit
‘Locks Up.’
1. Controller ‘Locks Up.’
1. Recycle power to the unit by removing AC power, waiting 10
seconds and reconnecting power.
DANGER!
HMI and/or
Controller
display remains
at zero or
shows no
change.
1. Display remains at zero or shows no
change, but the process is changing.
1. Recycle power to the unit by removing AC power, waiting 10
seconds and reconnecting power. If the problem persists, contact
the local DHT representative.
Entire System
is OFF.
2. External 120V AC power disconnected or
ON/OFF switch on control panel
failed/OFF.
2. Check to make sure external circuit breaker is ON and there is
power supply available. Replace the ON/OFF switch on the control
panel if faulty.
This should be done by using the user provided circuit
breaker or fuse, not by removing the power wires at the
terminal block. Serious injury or death can occur if
contact is made with the incoming AC power.
