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©1997, AMERICAN HAKKO PRODUCTS, INC.
ALL RIGHTS RESERVED
17
TROUBLE-SHOOTING.
Those occasions when trouble-shooting might be required are rare. However, if certain conditions occur, you may refer to
this section. The conditions requiring your attention are:
1. The unit quits running. The power switch is on but nothing happens.
a. The motor has overheated. The overtemperature switch will keep it from operating until it has cooled down.
This is usually 30 minutes. Meanwhile, you can:
i. Check each station. Make sure that the pickup ducts are not blocked.
ii. Check the air outlets at the bottom and side of the HJ3100 unit. Make sure they are not blocked.
b. There is an electrical problem that has caused a fuse to blow. There is a fuse in the motor/blower unit; later
models also have a circuit breaker on the case.
i. If the circuit breaker has blown (the reset button is exposed), DO NOT reset until you have checked the
wiring for shorts or other defects, including the inadvertent intrusion of foreign objects.
ii. Turn the HJ3100 OFF and remove the power plug from the receptacle. See the wiring diagrams in
Appendix B to verify integrity of the wiring (that loose wires, disconnected wires, broken wires &c do not exist).
2. The unit runs but does not have any air flow.
a. A station (or stations) is (are) blocked.
i. See 1 i, ii above.
ii. Inspect all flexible ducts. Make sure they are not kinked, blocked, or pinched. If they are, correct the
situation or replace the ducts.
iii. Inspect the hoods. Make sure they are not blocked or plugged.
b. There is an opening in the setup, allowing air to enter the unit.
i. Inspect all connections. Tighten or reset where necessary.
c. The blower wheel has come adrift from the motor shaft. This has been simulated during test and is exemplified
by a marked change in the sound coming from the HJ3100. Instead of the steady whirr of a properly operating unit, it will
be a high-pitched whirr accompanied by clanking noises. Should this be suspected:
i. Turn the HJ3100 OFF and remove the power plug from the receptacle.
ii. Set the main body on a bench and remove the screws holding the bottom cover.
iii. Remove the bottom cover.
iv. Inspect the assembly for structural integrity.
If the blower is loose, close the unit and return it to your Hakko distributor for repair.
d. The motor/blower does not turn. This becomes evident when there is no air flow and the sound made by the
HJ3100 is a hum. If this is suspected, return the HJ3100 to your Hakko distributor for repair.
3. If you encounter a problem that defies solution by these means, call your Hakko representative.
WARNING!!
DO NOT ATTEMPT TO OPEN THE HJ3100 WITH POWER APPLIED.
YOU ARE EXPOSING YOURSELF TO SERIOUS INJURY OR DEATH.