13.Steam damper system is not functioning properly (for STEAM MODELS ONLY)...

a.Steam damper sticking closed.

b.Leak in pneumatic system.

14.Undersized load, dryer requires a minimum load size of approximately 125 lbs (57 kg) for maximum drying efficiency.

R.Excessive noise and vibration...

1.Dryer is not leveled properly.

2.Impellor (fan/blower) out of balance...

a.Excessive lint buildup on impellor (fan/blower)...check air jet.

b.Failed impellor (fan/blower).

3.Loose motor mount.

4.Failed idler bearings or basket (tumbler) bearings.

5.V-belt(s) either too tight or too loose.

6.Basket (tumbler) drive wheels are worn or are loose.

7.Set screws of basket (tumbler) drive shaft bearings are loose.

8.Failed motor bearing.

9.Drive wheel is loose.

10.Failed drive wheel.

S.Dryer will not tilt...

* Tilt to load.

1.Correct door signals are not present.

a.Door open to tilt up.

b.Door closed to tilt level.

2.Defective proximity switch.

3.No (external) compressed air to pneumatic switches...80 PSI (5.51 bars) required (11 cf/hr [0.31 cm/hr]).

4.Lint drawer is open.

108

Page 112
Image 112
American Dryer Corp AD-310 Phase 7 service manual Excessive noise and vibration