AIR-COOLED FLUID COOLER
31 • Air-Cooled Condenser Manual
If any form of trouble-shooting service is required inside the fan motor terminal box, do not
open the axial fan terminal cover within the first five (5) minutes after turning OFF the electrical
power to the unit.
7.6.1 Electronically Commutated (EC) Fan Troubleshooting
To troubleshoot a non-working EC motor fan that has factory default settings. Follow the steps
in the listed order for best results.
7.6.2 Before you begin
Read the Operating Instructions for detailed instructions and critical safety information
regarding this product.
7.6.3 Tools required for initial troubleshooting
• T20 Torx bit for removing the terminal box cover and ground lug
• 1/8” inch wide slotted screwdriver for the terminal wiring
• AC/DC voltmeter or multimeter
• Continuity meter
• Jumper wire (10VDC rating)
NOTICE: Confirm there are no obstructions to the blade or rotor
assembly.
CAUTION: Do not attempt to remove any obstruction without first
disconnecting the power to the motor. Once the obstruction is
removed the motor will start if powered. Disconnect AC power to
the motor, determine if the blade will spin and rotate freely. Any
blockage or rubbing will cause the motor to stop operation until the
obstruction is removed.
7.6.4 Confirm to Following
• The unit does not have any visible external damage (damaged or missing blades,
bent impeller, missing balance weights, etc.). Do not power up any module (EC
motor/fan blade) that has external damage. The module should be replaced
(contact Data Aire Technical Service at 800-347-2473).
• The unit has not stopped due to operating in temperatures above the recommended
operating range. The motor may have been exposed to temperature above the
maximum operating temperature. Under such conditions the motor will stop and
NOT restart automatically. The motor must be reset by disconnecting the AC power
for 3 minutes. This will internally reset the motor. Reapply the AC power. The motor
should run at full speed.
• Correct the reason for the over temperature condition.
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