Table 24 Reheat Troubleshooting - Liebert Himod Operation & Maintenance Manual

Table 24 Reheat troubleshooting
Symptom
Reheat will not operate;
contactor not pulling in
Reheat not operating; contactor
pulling in
NOTE
Reheat element sheaths and fins are manufactured with aluminum. Regular inspections are
necessary to assure proper cleanliness of the reheating element. Should inspection reveal
corrosion particles on the reheating element or adjoining surfaces (including ducts and
plenums), appropriate cleaning should be performed. Periodic reheating element replacement
may be required to meet specific application requirements.
Possible Cause
Control not calling for heat
One of reheat safety stats open
Heater burned out
Check or Remedy
Check monitor status.
Jumper between terminals P34-1 and P34-2. If
reheat operates, a safety is open. Remove jumper.
Find open safety. Reset or replace safety.
Turn off power and check heater continuity with
Ohm meter.
Troubleshooting 61