Frymaster MTB-310A Service Manual
OPERATIONS MANUAL
MTB-310A TEST BOX
168°C / 335°F
143°C / 289°F
97°C / 206°F
79°C / 175°F
3°C / 37°F
VARIABLE
SHORT
OFF
NOTE: TEMPERATURES MAY VARY
±2°F / ±1°C FROM ACTUAL.
BASKET
LIFT
CMIII
CMII
LEFT
S
O
U
N
D
The Frymaster Corporation, 8700 Line Avenue
TEL 318-865-1711 FAX 318-868-5987
HEAT
350°F / 177°C
375°F / 191°C
391°F / 199°C
414°F / 212°C
OPEN
VARIABLE
ALARM
OFF
RELAY
POWER
168°C / 335°F
143°C / 289°F
OFF
97°C / 206°F
79°C / 175°F
3°C / 37°F
SHORT
ALARM
P
O
W
E
R
OFF
RIGHT
BASKETHEAT
LIFT
TESTON
OFF
MTB310A
VARIABLE
350°F / 177°C
375°F / 191°C
391°F / 199°C
414°F / 212°C
OPEN
VARIABLE
1A F.B.
FUSE
24-Hour Service Hotline
1-800-551-8633
MAR 11
*8195162*
TABLE OF CONTENTS
Page #
INTRODUCTION 3
PARTS ORDERING 3
PARTS LIST 4
CONTROL PANEL DIAGRAM 5
COMPUTER MAGIC III.5 / DEAN Compu-Fry TEST PROCEDURE 6
SOLID STATE CONTROLLER TEST PROCEDURE 8
M2000 TEST PROCEDURE 9
DIGITAL CONTROLLER TEST PROCEDURE 12
ELECTRONIC TIMER TEST PROCEDURE 13
CM4-S TEST PROCEDURE 14
KFC-1 / SMS TEST PROCEDURE 15
2
INTRODUCTION
The MTB-310A Test Box is a tester designed to test most Frymaster cooking
computers and controllers for correct operating and controlling functions.
PARTS ORDERING
Parts orders must be placed directly with your local Factory Authorized Parts
Distributor. If you do not have a Factory Authorized Service Center list, please
contact Frymaster Service Department at 1-800-551-8633 or 1-318-865-1711.
To speed up your order, the following information is required:
Model Number: __________________
Part Number: __________________
Quantity Required: __________________
PARTS ORDERING/SERVICE INFORMATION CANADA – Garland Commercial
Ranges, Ltd., 1177 Kamato Road, Mississauga, Ontario L4W 1X4.
NOTE: RETAIN AND STORE THIS MANUAL IN A SAFE PLACE FOR FUTURE
USE. ADDITIONAL COPIES MAY BE OBTAINED FROM YOUR FACTORY
AUTHORIZED SERVICE CENTER.
3
2
1
3
PARTS LIST
Item Part Number Description
1 806-5093
2 806-5023 Transformer Assembly 120/12V Domestic
3 806-5095 Cable Assembly, Frymaster Computers Only
* 806-4803 Cable Assembly, Dean Compu-Fry Computer Only
* 806-5094
* 806-5096 Transformer Assembly 240/12V International
* Not Illustrated
Test Box MTB-310A 120/12V Domestic (Includes cable and
transformer assembly.)
Test Box MTB-310A 240/12V International (Includes cable and
transformer assembly.)
4
VARIABLE
BASKET
LIFT
LEFT
21
HEAT
3
RELAY
POWER
HEAT
RIGHT
BASKET
54
VARIABLE
LIFT
12
7
TEST
OFF
168°C / 335°F
143°C / 289°F
97°C / 206°F
79°C / 175°F
3°C / 37°F
SHORT
CMIII
8
OFF
CMII
NOTE: TEMPERATURES MAY VARY
±2°F / ±1°C FROM ACTUAL.
6
SHORT
ALARM
11
OFF
168°C / 335°F
350°F / 177°C
375°F / 191°C
391°F / 199°C
414°F / 212°C
OPEN
VARIABLE
ALARM
9
S
O
U
N
D
OFF
143°C / 289°F
ON
10 P
OFF
97°C / 206°F
79°C / 175°F
3°C / 37°F
O
W
E
R
CONTROL PANEL
1. Left Basket Lift Indicator
Basket Lift Motor Drive
Not used for M2000 or
KFC-1/SMS computers.
2. Left Heat Indicator
ON When Heating
3. Power On Indicator
Power to Fryer Relays &
Computer
4. Right Heat Indicator
ON When Heating
5. Right Basket Lift Indicator
Basket Lift Motor Drive
Not used for M2000 or
KFC-1/SMS computers.
6. Left Probe Switch
Simulates Temperature
NOTE: For power other than 120VAC 60Hz, use 240V transformer.
7. Right Probe Switch
Simulates Temperature
8. Sound Switch
Select Computer Type
9. Left Alarm Switch
Simulates Alarm Signal Input
10. Tester ON/OFF Switch
Power To MTB-310A Test Unit
11. Right Alarm Switch
Simulates Alarm Signal Input
12. Test Switch
Places Computer in Special Test Mode.
To be used by Factory Certified
Technicians or other qualified
technicians with assistance from the
Frymaster Service Department.
350°F / 177°C
375°F / 191°C
391°F / 199°C
414°F / 212°C
OPEN
VARIABLE
1A F.B.
FUSE
MTB310A
5
COMPUTER MAGIC III.5 / DEAN Compu-Fry* TEST PROCEDURE
A. INITIAL TEST SET-UP
1. Set-up MTB-310A as follows:
(a) Set ALARM switches (9 & 11) to OFF.
(b) Set PROBE switches (6 & 7) to 97 °C/206°F. If using a Solid-State or
Digital Controller, set to 79°C/175°F.
(c) Set POWER switch (10) to OFF.
(d) Set SOUND switch (8) as required for each computer type.
(e) Connect 120/24V transformer to 120VAC outlet or 240/24V
transformer to 240VAC outlet.
2. Set computer/controller up as follows:
(a) Set POWER switches to OFF.
(b) Set MELT switches to OFF. (Solid state controller only)
(c) Connect MTB-310A 15-pin connector to rear of computer or
controller.
3. Set MTB-310A POWER switch (10) to ON
(a) If using a CMIII.5, CM4-S or KF C1/SMS computer, program the set
point to 375°F/191°C. If using an M2000 computer, use
programming instructions in fryer service manual to program “FR
FRIES” set point temperature to 168°C/335°F. If using a Digital
Controller or an Electronic Timer/Basket Lift, program the setpoint to
350°F/177°C.
*Note: Some of the test setups are the
same for various computers found in
this manual.
B. TEST POWER TO FRYER INTERFACE BOARD
1. Press Computer/Controller ON/OFF switch to ON.
2. RELAY POWER indicator (3) should illuminate.
NOTE: If testing a split vat computer or dual vat controller, complete previous
step utilizing both computer/controller power switches (one ON at a time unless
an M2000 computer or Electronic Timer/Basket Lift is being tested. Both sides
of these computers can be tested at the same time.).
C. TEST MELT-CYCLE FUNCTION
1. Press Computer/Controller ON/OFF switch to ON.
2. Set MTB-310A PROBE switches (6 & 7) to 79°C/175°F.
(a) RELAY POWER indicator (3) will illuminate.
(b) HEAT indicators (2 & 4) should cycle on and off with the computer
heating indicator (decimal point on computers and digital
controllers). “CYCL”, “LOW TEMP” or “LOW” will be displayed on
the computers depending on the model.
3. Set MTB-310A PROBE switches (6 & 7) to 97°C/206°F.
(a) HEAT indicators (2 & 4) should illuminate continuously.
(b) Computer/Controller heat indicators (decimal point) will illuminate
continuously and display either “°.-Lo”, “LOW” or a blank display
depending on the model.
NOTE: On a full vat computer, only RIGHT HEAT indicator (4) will function.
6
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