B&C Technologies DI-475 Industrial - Manual (Page 44)

4. Failed igniter/flame-probe assembly
5. Failed direct spark ignition (DSI) module
6. Failed gas valve
W. No heat (STEAM MODELS ONLY)…both microprocessor controller (computer)
L.E.D. heat indicator dot and the “HEAT” relay output L.E.D. are on…
1. Fault in 225 hi-heat (limit) switch circuit or thermostat
2. No (external) compressed air to steam damper… 80 PSI reguired
3. Failed steam damper 24 VAC pneumatic solenoid valve
4. Failed steam damper piston
5. Steam damper stuck closed
X. Dryer operates but is taking too long to dry…
1. Exhaust duct work run too long or is undersized…back pressure cannot exceed
.3 inches W.C.
2. Restriction in duct work…cheat duct from dryer all the way to the outdoors
3. Low and/or inconsistent gas pressure (GAS MODELS ONLY)
4. Insufficient make-up air
5. Poor air/gas mixture at burner-yellow or poor flame pattern…adjust gas burner air
adjustment shutters (GAS MODELS ONLY)
6. Lint drawer/screen not being cleaned on a regular basis or often enough
7. Extractors (washers) not performing properly
8. Sail switch is fluttering…restriction in exhaust (GAS MODELS ONLY)
9. Failed microprocessor controller (computer)…temperature calibration is inaccurate
10. Failed microprocessor temperature sensor…calibration is inaccurate
11. Failed burner hi-limit (GAS MODELS ONLY)
12. Failed 225 hi-limit (thermostat)
13. Steam damper system not functioning properly (STEAM MODELS ONLY)
a. Steam damper sticking closed
b. Leak in pneumatic system