Troubleshooting Guide - Schwank Epic14 Series Installation Manual

Troubleshooting Guide

Problems
Non-Operational
No Air / Minimal Air
Continuous ON (Unit Not Turning off)
Excessive Noise / Vibration
Uneven Airflow
Excessive Air Spill
No Heat / Minimal Heat
Excessive Heat
Possible Causes Solutions
No Power from Power Source Ensure power line is active and ON
Failed Switch Replace Failed Switch
Blown Fuse Determine Root Cause then replace fuse
Motor Safety Tripped Built-in motor safety switch, will reset automatically after cool down.
Replace motor if it does not reset.
Negative Building Pressure Add Makeup Air Units to improve building pressure
Air Intake or FIlter Clogged Clean / Un-Clog Filter – Follow maintenance section
Air Nozzle Adjust nozzle to correct angle – Ensure there is no obstruction
Manual Low Air Speed Ensure the unit is set to Max Recommendeed Speed
Door Switch is stuck or Return the door switch to normal operation positions – If not returning with
permanently energized normal pressure, replace door switch.
Continuous operation Turn OFF continuous mode from controller
Mode: ON
Blower wheel loose on motor Tighten screw connecting blower wheel and motor shaft
shaft.
Loose blower Housing Tighten Housing on Fan Deck
Blower Rubbing against Replace Motor if Motor Shaft Bent / Adjust blower location on shaft if rubbing
with corners of housing
Housing
Damaged Blower Replace Blower Wheel
Dirty Blower Wheel Remove the front screen and clean the blower wheels – If necessary, re-
move the blowers and clean.
One Motor not Operating Replace or Fix the Motor
Shaft Not Turning Blower Wheel Tighten the Blower Hub Screw
Incorret nozzle angle Adjust nozzle angle for best setting – 15 Degress towards outside is most
optimal (also depends on wind condition)
Improper Connection (Voltage) Must be wired to Three Phase 208V or 480V or 600V
Thermostat Tstat Set Point Achieved (ambient conditions) / Tstat Malfunction or wiring
Coils Malfunction Replace Heating Coil
Contactor not functioning Replace or Repair Contactors
Thermal Safety Switch Automatically resets twice and if the thermal safety switch still trips, find the
root cause and replace the switch
TStat in wrong location Relocate the thermostat close to the unit for actual temperature and away
from air stream
Tstat Configured Wrong Reset Tstat and adjust for the correct temperature
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