Steffes 612EXT Troubleshooting Guide - Manual (Page 4)

MODEL: EXT (
2-Mode Circuit Board without Outdoor Sensor)
FUNCTION: Core Charging
PROBLEM: Unit Charges Unevenly
Before starting any procedures listed below, check room thermostat and circuit breaker settings.
NOTE: For cross reference to number coded components, refer to the Exploded View Diagram.
UNIT CHARGES UNEVENLY
Check unit amperage.
Check fans (53) and dampers for
smooth operation.
Check heating elements
(54), charge control
sequencer (49), and
core charging high
limits (33) for proper
operation.
Correct Incorrect
Repair fan/damper
system.
Contact technical
support at the factory
1-888-STEFFES.
OK
Defective
Check input circuit(s).
Repair or replace
defective parts.
Correct Incorrect
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