Asco 1251794, Руководство пользователя

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Appendix
Load Bank Troubleshooting Guide
A-2
PROBLEM
POSSIBLE
CAUSES/REMEDIES
2. Blower motor does not
operate.
a. Main switch or circuit breaker is not closed.
b. Power is not connected to Load Bank blower circuit.
c. External power source is inadequate.
d. Motor fuses are blown. (Check and replace as required.)*
e. Motor overload is tripped.
f. Motor start is malfunctioning.
g. Main Power Switch is inoperative.
h. Connections are broken or loose.
i. Motor shaft does not turn due to improper lubrication.
(Replace or repair as necessary.)
3. BLOWER FAILURE
indicator lights, yet
blower is operating.
a. Airflow restrictions present at Load Bank intake or
exhaust.
b. Improper fan blade rotation or phase reversal.
(Check fan motor power connections for proper phase
sequence.)
c. Air Differential Pressure Switch is malfunctioning.
d. Blower Fail Relay is malfunctioning.
4. Fan blade is broken or
not turning.
a. Fan blade motion is obstructed.
b. Fan blade is loose at hub or is not keyed properly.
*When checking fuses for continuity, be sure to remove all fuses from clips (in
fuseblock or Disconnect Switch). Test each fuse individually, out of circuit. (If
tested in circuit, there is the possibility of feedback which causes false readings. A
blown fuse may still check out OK.)