Power Soak 37179 PS-275 Service Manual - Manual (Page 25)

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6.2 Communication Port
A communication port (USB “A” style) is located on the bottom of the control panel
enclosure and connected to the UPM by a cable. The connection port is protected by a
cover that screws on to the body of the connector. The operating program is loaded
into the UPM or copied from the UPM by using this port. Inserting a blank USB Flash
Drive into this port will activate the programming module to copy the operating program
to the flash drive. Inserting a USB Flash Drive that contains an operating program will
activate the UPM to load the program into the module, overwriting any program already
contained in the UPM.
6.3 Alert Lights
The Alert lights are inserted through holes in the
bottom of the control panel box and are secured
with a nut screwed onto the body of the light. A
connector is plugged into each of the lights. The
connector for each light has a wire with a colored
stripe that matches the color of the light to which it
is connected.
6.4 Triac Relay
Triac Relay is a solid state switch for connecting the high voltage to the pump motor and
to the heater (not all machines have heaters). The Triac is a three terminal
semiconductor for controlling current in either direction. The Triac is used similar to a
contactor. When a gate voltage is applied from the UPM (similar to coil voltage on a
mechanical contactor relay), the Triac conducts (closes) through the power terminals.
On a single phase Control Panel, there are two Triacs, one for the Heater, the other for
the Motor. Terminals 2 and 3 on each Triac are supplied with incoming voltage. On the
top of these Triacs, they are labeled M1 (motor leg 1) and H1 (heater leg 1). On a three
phase Control Panel there are four Triacs, two for the Heater, and two for the Motor.
Two of these are labeled identically to the previous single phase panel description. The
other two are labeled M3 (motor leg 3) and H3 (heater leg 3). Terminals 2 and 3 on
each Triac are supplied with incoming voltage. To test the Triac, first verify the input
voltage to the Triac. An LED on the Triac board illuminates when gate voltage is
applied by the UPM. If this light is on, the Triac should be closed, and terminal 1 of the
Triac should be supplying power to the respective device. If the LED is off, there should
be no current on the output side of the Triac (voltage check on the output is not a valid
test on a Triac).
The Triac relays are connected to high voltage electricity.
The power to the machine must be turned off at the circuit
breaker in the wall mounted enclosure when working on
the Triacs. Failure to turn off the power will result in
serious injury and possibly death.
Communication port
Alert lights on the bottom of the control panel