Problem Solutions
Applicator and supply hose
overheat
1. Determine exact voltage of the melt unit. Insufficient
voltage can be the cause of these problems. Voltage
drops are common. Use a voltmeter to determine
whether sufficient voltage is supplied to the melt
unit. Also, the voltage of each melt unit component
must be compatible to the melt unit or serious
damage to the system will occur. (Refer to
section 4.4, Electrical Circuits & Wiring).
2. Adjust the supply hose temperature controller
according to section 5.3 in this manual. Inadequate
supply hose heat can affect the performance of your
hot melt system. If problem persists, see Hose
Controller Replacement, section 8.2, and section 9
for Hose temperature controller kits.
3. Determine if applicator is heating by using a surface
temperature probe or a temperature-sensing device.
Do not touch applicator by hand to determine
temperature. Refer to the appropriate applicator
service manual.
Pump inoperative 1. Main Breaker: Turn the system power switch to the
On position. If switch light fails to illuminate, the
switch may need replacement. System power switch
and pump motor switch must both be in the On
position for pump to operate.
2. Determine exact voltage of the melt unit. Insufficient
voltage can be the cause of these problems. Voltage
drops are common. Use a voltmeter to determine
whether sufficient voltage is supplied to the melt
unit. Also, the voltage of each melt unit component
must be compatible to the melt unit or serious
damage to the system will occur. (Refer to
section 4.4, Electrical Circuits & Wiring). Determine
exact voltage and frequency of the pump motor
marked on the motor data label located on the motor.
3. Switch the pump motor On/OFF switch to the On
position. Allow sufficient time for the melt tank to
reach operating temperature. This will cause the
pump warm-up switch to close, thus completing the
pump motor circuit. If warm-up switch is faulty or
rated at a higher temperature, it must be replaced.
Refer to section 9.
4. Determine which pump is mounted in your melt
unit. (Refer to the melt unit I.D. plate). The pumping
performance, listed in section 3 of this manual,
depends upon certain pump and pump motor
combinations. (Refer to section 9 for pump kit
information.) Look into the melt tank for any foreign
material plugging the inlet pump port. Pump gears
can freeze up; in which case the pump may need
replacement or repair.
2000280
PUMP WARM-UP THERMOSTAT
(V3 and V4)
PUMP WARM-UP THERMOSTAT
(V2)
32 KB30, KB50 and KB100 Series Hot Melt Units 19600-159 Rev. A 04/09/09 © Copyright Astro Packaging 2009
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