![background image](http://html1.mh-extra.com/html/taylor/freezemaster-336/freezemaster-336_service-manual_3816384020.webp)
Service Tips for Generation II Boards
Initial Service Tips
1. Check all connections.
2. Check the cable to verify that it is secure.
3. Verify that all pins are securely fastened in their sockets.
4. Verify that all cables correctly face away from the
boards. If the cable is attached incorrectly, damage to
the logic board will occur. Air/mix pump and beater
motor operation will be disabled.
5. Verify probe resistance.
6. Use the self-test program.
Self-Test Program
The Generation II controls are programmed for a self-test.
The control can be used to help identify problems in the
power board, the logic board, and the thermistor probes. The
self-test program is not intended to, and will not take the
place of a reasonable, and prudent service technician.
The self-test program is divided into two sections. The first
section is an automatic function of the micro processor and
the second section is performed by the technician.
The self-test program is initiated by holding down the MIX,
WASH, AND PUMP keypads on the logic panel while
simultaneously turning on the power switch. Hold down the
keypads until all eight lights illuminate. If all eight lights do
not illuminate, the control is defective. If the self-test cannot
be initiated, the control is defective.
Figure 2.
Each light corresponds with a particular relay. The light on
the panel will not extinguish until the test is completed for
that particular relay.
Logic Panel Light
Corresponding Relay
MIX LOW
Mix Relay
MIX OUT
Fan Relay
MIX
Pump Relay
STANDBY
Beater Motor Relay
WASH
Compressor Relay
AUTO
Spinner Relay
PUMP
Portion Relay
In each of the tests the relay on the power board will close
and the component will operate for three seconds. There is a
ten second delay between each check.
When the self-test is initiated, all eight lights will remain on
for three seconds. At this time, the processor will begin to
check the power board relays as follows:
1. The SET POINT light turns off.
2. Ten seconds after the SET POINT light turns off, the mix
relay closes for three seconds.
3. The mix relay opens and the MIX LOW light turns off.
4. Ten seconds later, the fan relay closes.
5. Three seconds later, the fan relay opens and the MIX
OUT light turns off.
Summary of Contents for Freezemaster 336
Page 23: ...Control Overview...
Page 31: ...Model 336 Exploded View...
Page 33: ...Model 336 Panel Identification...
Page 35: ...Model 338 Exploded View...
Page 37: ...Model 338 Panel Identification...
Page 39: ...Model 339 Exploded View...
Page 41: ...Model 339 Panel Identification...
Page 43: ...Model 750 Exploded View...
Page 45: ...Model 750 Panel Identification...
Page 47: ...Model 751 Exploded View...
Page 49: ...Model 751 Panel Identification...
Page 51: ...Model 754 Exploded View...
Page 53: ...Model 754 Panel Identification...
Page 55: ...Model 774 Exploded View...
Page 58: ...Model 774 Panel Identification...
Page 60: ...Model 794 Exploded View...
Page 62: ...Model 794 Panel Identification...
Page 66: ...Control A X32963 27A Models 339 754 208 230 60 1...
Page 112: ......
Page 113: ......
Page 114: ......
Page 115: ......
Page 116: ......
Page 117: ......
Page 118: ......
Page 119: ......
Page 120: ......
Page 121: ......
Page 122: ......
Page 123: ......
Page 124: ......
Page 125: ......
Page 126: ......