Troubleshooting
Problem
Possible Cause
Corrective Action
Motor does not
energize
Your control circuit is
not calling for motor
to energize
Measure voltage across terminals M1 and M2. A 0 Volt
reading indicates either
ICM441
’s contacts are closed OR
your control circuit is not calling. Check safety switches or
thermostat.
Incorrect voltage
range selected
to power input of
ICM441
Rewire
ICM441
as listed above
Incoming voltage
is low
Measure between L1 and LO (120 VAC) or L1 and HI (208-
240 VAC). Spec is 85±5.5 VAC (120 VAC) or 170±10 VAC
(208-240 VAC). It may also be possible that the motor pulls
down the line
AFTER
it is energized. Measure line voltage
with contactor closed.
Sensor is out of
specification
Allow motor to cool if sensor is > 3K
Ω
. Bypass sensor
if sensor resistance is >25K
Ω
. Bypass sensor if sensor
resistance is <500
Ω
. Sensor may be shorting to a winding or
to ground during operation, repair as necessary.
Motor turns off right
after energized
Low voltage
Ensure voltage does not drop below spec when motor is
energized. Measure voltage between L1 and LO or HI during
motor start.
Bad sensor
Sensor may be shorting to a winding or chassis during motor
operation. Measure resistance of sensors while bypassing
terminals M1 and M2. Bypass sensor if required.
Motor turns off after
running for a while
Winding overheating
Check for phase unbalance or phase loss to motor. Check
for low-voltage during operation. Control circuit may have
also opened, check pressure switches or thermostat.
Motor was on, but
will not re-energize
Anti-Short-Cycle
Timer
Wait 5-minutes for built-in anti-short-cycle timer to time out.
Defeat anti-short cycle timer by shorting terminal “C” to
hidden terminal “X.”
Motor was on, but
will not re-energize
Motor over
temperature
Verify motor temperature with a temperature probe. Measure
resistance of sensors, if any sensor was over 10K-ohms, the
ICM441
will not reset until ALL sensors return below 3K
Ω
.
Step-Down Transformer
Typical System Wiring Diagram (120-460 VAC)
Step-Down Transformer
Typical System Wiring Diagram (120-240 VAC)
Bypassing A Sensor
Since these sensors are internally wound into the winding of the motor, they are not field-replaceable.
In the event that the resistance of a sensor is found to be outside of the 500
Ω
to 3K
Ω
range, the
sensor must be properly bypassed in order for this motor protector to function.
To bypass a sensor, you must disconnect the defective sensor’s wire from the
ICM441
, and connect
a 1/2-Watt 1.0K
Ω
to 2.0K
Ω
resistor from terminal “C” to the open sensor terminal. These resistors can
be purchased at any electrical hobby shop, such as Radio Shack. Consult the “Bypassing a Sensor”
wiring diagram for an illustrative explanation.
Bypassing A Sensor Wiring Diagram
ONE-YEAR LIMITED WARRANTY
The Seller warrants its products against defects in material or workmanship for a period of one (1)
year from the date of manufacture. The liability of the Seller is limited, at its option, to repair, replace
or issue a non-case credit for the purchase prices of the goods which are provided to be defective.
The warranty and remedies set forth herein do not apply to any goods or parts thereof which have
been subjected to misuse including any use or application in violation of the Seller’s instructions,
neglect, tampering, improper storage, incorrect installation or servicing not performed by the Seller.
In order to permit the Seller to properly administer the warranty, the Buyer shall: 1) Notify the Seller
promptly of any claim, submitting date code information or any other pertinent data as requested by
the Seller. 2) Permit the Seller to inspect and test the product claimed to be defective. Items claimed
to be defective and are determined by Seller to be non-defective are subject to a $30.00 per hour
inspection fee. This warranty constitutes the Seller’s sole liability hereunder and is in lieu of any other
warranty expressed, implied or statutory. Unless otherwise stated in writing, Seller makes no warranty
that the goods depicted or described herein are fit for any particular purpose.
LIAF057
Patent No. 424,953
7313 William Barry Blvd., North Syracuse, NY 13212
(
Toll Free
) 800-365-5525 (
Phone
) 315-233-5266 (
Fax
) 315-233-5276
www.icmcontrols.com
