Steffes 612EXT Owner & Installers Manual - Manual (Page 24)

Before starting any procedures listed below, check room thermostat and circuit breaker settings.
Note: For cross reference to number coded components, see figure 7.
F. ROOM UNIT TROUBLESHOOTING GUIDES
Check wall thermostat for
possible miscalibration
Check voltage across F1 & F2 terminal
block positions (24).
NO VOLTAGE PRESENT VOLTAGE PRESENT
Check wall thermostat and/or
field wiring.
Check voltage across fan high limit
switch terminals (56).
NO VOLTAGE PRESENT VOLTAGE PRESENT
Replace fan limit switch (56). Remove fan assembly (47) and check
voltage to fan motor(s) (53).
NO VOLTAGE PRESENT VOLTAGE PRESENT
Check fan impeller for debris that
could cause jamming. Replace if
necessary.
Check units internal
wiring.
Set wall thermostat to high
stop position.
FAN(S) DO NOT OPERATE. FAN(S) NOW OPERATE.
Model: S Series Only
Function: Air Delivery
Problem: Fan(s) do not operate.