Eastey ET2008, User Manual

Page: 39 / 57

Troubleshooting 39
Problem Solution
No air flow 1. Check AC Inverter adjustable speed pot settings
below.
•
C.L.: Set at approximately 12 o’clock.
•
Max.: All the way counter-clockwise.
•
Min.: All the way clockwise.
•
ACC.: All the way clockwise.
•
Comp.: Set at approximately 12 o’clock.
Detail View of Jumpers and Trim Pots
CON3
CON1
P1 P2 P3
CON2
A/M
F - S - R
J2
X1 J1
J1
230 V 115 V
X2
ST
PW
R
50/60 Hz
CL MAX MIN DEC/B ACC COMP
Jumpers and Trim Pots
(Shown in Factory Setting)
(Located on Lower PC Board)
Line Voltage Selection Jumper J1
(Located on Upper PC Board)
(Models KBVF-21D, 22D,23D, 24D & 26D Only)
Important Application Information:
Motor with External Fan Cooling – Most totally-enclosed fan-cooled
(TEFC) and open-ventilated 3-phase AC induction motors will
overheat if used beyond a limited speed range at full torque.
Therefore, it is necessary to reduce motor load as speed is
decreased.
Note: Some fan-cooled motors can be used over a wider speed
range. Consult the motor manufacturer for details.
WARNING! Some motors have low speed characteristics
which cause overheating and winding failure under light-load or no-
load conditions. If the motor is operated in this manner for an
extended period of time, it is recommended that the unloaded
motor current be checked from 1–15 Hz (60 – 450 RPM) to ensure
motor current does not exceed the name-plate rating. Do not use
motor if the motor current exceeds the nameplate rating.
2. Check intake screens inside upper chamber to see
if they are clogged.
3. Blower motors are controlled by 220 volt single-
phase input and three-phase output. (Check lead
to lead. Not lead to ground.)
4. Is there a steady green and a slowly-flashing
green light? If not, check input fuses. If fuses are
good, replace AC inverter.
5. If there is a steady green light and not a slowly-
flashing green light, refer to the table that follows
for information about what the flashing LEDs
indicate.