User Manual

INSTALLATION AND MAINTENANCE MANUAL
Tsunami FAMILY
SPREAD SPECTRUM RADIOS
SEPTEMBER 1999
PAGE 4-12 SECTION 4: TROUBLESHOOTING
4.6.4 FAN Alarm
Function:
This alarm activates only when one or both of the internal fans are faulty.
Possible Cause:
❖ Faulty fan inside the radio.
Recommended Actions:
1. Check environmental conditions of the radio. Assure that the ambient temperature at the radio
location is within specification of the radio. If not, apply environmental conditioning to radio
location or place radio at alternate location where the environmental specifications are met.
2. Visually inspect radio mounting area and ensure that right and left sides of the radio chassis
are unobstructed for airflow.
3. Verify that at least one of the internal fans are operational by temporarily covering some of the
ventilation holes on the right side of the radio (as you face the front panel) with a thin piece of
paper. Slowly pull the paper outwards away from the ventilation holes to determine if the fan is
pulling the paper toward the chassis. This can also be checked on the opposite side of the
chassis to verify that the fans are pushing air out of the chassis.
4. If at least one fan is working you may wish to postpone repair, as long as the unit is operating
without any other errors (the radio is designed to operate with only one fan)
5. If neither fan is working or if typical operating environment is greater than 30°C, it is
recommended that the unit be repaired at the soonest opportunity. Return the radio to the
factory for repair. See Section 4.5 for details.