American Dryer Corp. MLG-460 - Manual (Page 56)

52
A. POWER MALFUNCTIONS
1. Main Disconnect Will Not Turn On
a. PROBABLE CAUSES;
1a) Sprinkler isolated power source “OFF” or disabled.
2a) OL12 tripped or sprinkler circuit defective.
3a) Sprinkler activated.
4a) Sprinkler will not reset.
b. POSSIBLE SOLUTIONS;
1b) Verify “RED” “Sprinkler Power” on main panel to be illuminated.
• If “ON” go to paragraph #3b below.
• If “NOT ON” verify isolated sprinkler power source to the dryer.
Check sprinkler supply voltage at TB1 pin #4 and pin #5.
• If “OK” go to paragraph #2b below.
• If none, check incoming line voltage.
• If none, check fuse disconnect switch.
2b) Check if OL12 has tripped.
• If “OK” go to paragraph #3b below.
• If tripped, check sprinkler circuit, then reset and test.
3b) Check if sprinkler is activated...is the “SPRINKLER RESET” button “lit”?
• If yes, press “SPRINKLER RESET.”
Does the sprinkler reset?
• If “yes,” attempt to turn “ON” the main disconnect again.
• If “no” go to paragraph #4b below and on page 53.
4b) Sprinkler will not reset, verify that the sprinkler hi-limit has not tripped. (“GREEN” light is off.)
• If it has not tripped, check setting to be 550º F (273º C) and verify that the sprinkler RTD
(Resistive Temperature Device) is connected and has 100 ohms (100
Ω)
at 32º F (0º C)/109
ohms (109
Ω
) at 75º F (24º C).