Rheem 96v series Installation Instructions Manual page 122

From previous page.
After Blower on delay, Does IDM switch to low speed
and remain at low speed after switching?
Does I. B. M. energize at low speed?
Does furnace continue to operate at low
fire until T-stat satisfied or heat call
removed?
Remove heat call by setting
T-stat below room temp.
Does IDM Shut off after post purge?
Does I. B. M. shut off after 90 seconds? (plus slew)
Remove power to furnace, open blower compartment
and restore dip switches to original settings. Replace
blower door. Restore power to unit.
122
Check to make sure test mode dip switches are properly set.
Ensure T-stat not
switching to high fire or
test mode not timing out
(1 hour limit)
Double check - is heat call
completely off at IFC?
Fault code displayed?
See FAULT CODES under
troubelshooting in the I & O Manual
REPEAT THIS SEQUENCE UNTIL TROUBLE- FREE OPERATION
- Check wire and all connections between I.F.C.and I.D.M
- Check for 115 VAC on P3-1 & P3-3.
- Check I.D.M. capacitor.
- Check I.D.M. low speed. Replace if neccessary.
- Check all connections between IFC and ECM motor.
- Check 24V to ECM Motor. (low voltage connector, pins 1 & 4)
- Check P.F.C. Choke.
- Check all wiring and connections to P.F.C. choke.
- Check fault code display and see "fault codes" In I & O.
** System will attempt to light 4 times. Voltage Is present at gas valve for
only 7 seconds during each ignition trial. System will enter a 1 hour
lockout after 4 attempts.
PROBLEM PERSISTS
C
ST-A1194-52-X0