Blodgett MARK V 111-H Service Manual

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MARK V SERIES

CONVECTION OVEN

SERVICE AND REPAIR MANUAL

BLODGETT OVEN COMPANY

www.blodgett.com

44 Lakeside Avenue, Burlington, Vermont 05401 USA Telephone (802) 658Ć6600 Fax: (802)864Ć0183

PN 33144 Rev F (7/02)

Duplication of the information in this manual is prohibited without the consent of the Blodgett Service Department.

TABLE OF CONTENTS

1. INTRODUCTION

Oven Specifications 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2. OPERATION

Sequence of Operations 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cook Only - 18459 Rev D 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CE Approved Cook Only - 33339 Rev C 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cook and Hold - 18791 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Solid State Digital - 30070 Rev B 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CE Approved Solid State Digital - 33345 Rev C 2-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Fan Delay with Pulse Plus - 18466 Rev D 2-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Humidaire - 1846 Rev M 2-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Intellihold and Intelliplus - 22027 Rev A 2-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Intellitouch - 19361 Rev A 2-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Blodgett IQ Control - 33078 Rev A 2-21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3. CALIBRATION AND ADJUSTMENT

Doors 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Door Blower Switch 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Thermostat 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Solid State Manual 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Solid State Digital Control 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Intellihold and Intelliplus Controls 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Intellitouch Control 3-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Intellitouch II Control 3-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Blodgett IQ Control 3-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Blodgett IQ2T Control Factory Level Programming 3-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

IQ VVCĆ208 Control 3-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Probe Resistance vs Heating Elements 3-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Probe Resistance vs Temperature 3-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4. TROUBLESHOOTING

Heat System 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Display Error Codes 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Intellitouch 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Intellihold and Intelliplus 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Blodgett IQ Control 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TABLE OF CONTENTS

5. PARTS REPLACEMENT

Door Assembly 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Door 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Door Arm Support Assembly 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Window Assembly 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Compartment Liner Bottom 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Motor and Blower Assembly 5-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Blower Wheel 5-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Motor 5-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Electrical Components 5-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Bulb and Capillary Thermostat 5-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Electrical Components Located in the Control Module 5-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Door Switch 5-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CHAPTER 1

INTRODUCTION

MARK V

OVEN SPECIFICATIONS

ELECTRICAL SPECIFICATIONS

Installations within the U.S. and Canada

Single phase models require a 60 Hz, 208/240VAC, 3 wire service consisting of L1, L2 and ground. Three phase models require a 60 Hz, 208/240/440/480, 4 wire service consisting of L1, L2, L3 and ground. Wiring from the power source to any of the single phase units must be a minimum of #6 AWG copper stranded wire. Wiring from the power source to the 208/240 three phase units must be a minimum of #8 AWG copper stranded wire. Wiring from the power source to the 440/480 three phase units must be a minimum of #12 AWG copper stranded wire.

ELECTRICAL SPECIFICATIONS (per section)

KW Hz Volts Phase

U.S. and Canadian installations

11.0 60 208 1 51 - 51 - 6 AWG

11.0 60 208 3 31 29 29 - 8 AWG

11.0 60 220Ć240 1 44 - 44 - 6 AWG

11.0 60 220Ć240 3 26 24 24 - 8 AWG

11.0 60 440 3 15 14 14 - 12 AWG

11.0 60 480 3 14 13 13 - 12 AWG

General Export installations

11.0 50 208 3 18 18 18 4 Size per local code

11.0 50 220Ć240 1 48 - - 48 Size per local code

11.0 50 220/380 3 18 16 16 2 Size per local code

11.0 50 240/415 3 18 14 14 4 Size per local code

11.0 50 230/400 3 18 15 15 3 Size per local code

CE installations

11.0 50 400 3N 18 15 15 3 Size per local code

General Export Installations

Single phase models require a 50 Hz, 220/240VAC, 3 wire service consisting of L1, L2 and ground. Three phase models require a 50 Hz, 415/240 or 380/220 VAC, 5 wire service consisting of L1, L2, L3, neutral and ground. Use 90_C wire and size according to local codes.

CE approved installations

Single phase models require a 50 Hz, 230VAC 3 wire service consisting of L1, neutral and ground. Three phase models require a 50 Hz, 400/230VAC, 5 wire service consisting of L1, L2, L3, neutral and ground. Use 90_C wire and size according to local codes.

Amps

L1 L2 L3 N

Electrical Connection

(minimum size)

1-1

CHAPTER 2

OPERATION

MARK V

SEQUENCE OF OPERATIONS

NOTE: The following instructions represent the most common controllers. For questions regarding other

options call the Blodgett Service Department at (800)331Ć5842.

COOK ONLY - 18459 REV D

Component Reference

NOTE: Refer to FIGURE 1 page 2-2 for compoĆ

nent locations.

1. MODE SELECTOR SWITCH

2. COOK TIMER

3. DOOR SWITCH

4. TEMPERATURE CONTROL BOARD

5. AXIAL FAN

6. CONV ECTION FAN MOTOR

7. TEMPERATURE PROBE

8. SOLID STATE POTENTIOMETER

9. CENTRIFUGAL SWITCH

10. COOK LIGHT

11. ELEMENT CONTACTOR

12. HEATING ELEMENTS

13. 50 WATT LAMPS

14. LIGHT SWITCH

15. TIMER MOTOR

16. BUZZER

Operation

1. Turn the mode selector switch (1) to the cook position. Power goes to terminal #1 of the cook timer (2), one side of the door switch (3), terminal #8 of the temperature control board (4) and the axial fan (5).

2. If the doors are closed the door switch (3) should also be closed sending power to termiĆ nal #6 of the temperature control board (4) and to the convection fan motor (6).

NOTE: This motor has a built in centrifugal

switch (9) that closes when the motor reaches full speed. If found faulty do not bypass, the whole motor should be replaced.

temperature control board (4) and the solid state potentiometer (8).

Power is sent out of terminal #7 to one side of the centrifugal switch (9). If the convection fan motor (6) is at full speed the centrifugal switch (9) closes sending power to the cook light (10) and one side of the element contactor (11). When the contactor closes the heating eleĆ ments (12) power up.

4. The 50 watt lamps (13) only receive power when the light switch (14) is activated. These lamps are 115 volt and are wired in series parallel.

5. When the cook timer (2) is set for a time a cirĆ cuit is made between terminals #1 and #2 powering up the timer motor (15). At the expiĆ ration of the set time the switch in the cook timĆ er (2) toggles from 1-2 to 1-4 powering up the buzzer (16).

NOTE: Put the timer in the home position to siĆ

lence the buzzer.

NOTE: Turn the mode selector switch to cool

down to bypass the door microswitch. This allows the convection fan motor to operate even when the doors are open.

NOTE: This oven may be converted from single to

three phase, however, contactors must be changed due to the difference in amp draw. Reference detail inset in FIGURE 1.

NOTE: The resistive values for the probes used in

this oven have descending temperature coefficients. As the temperature increases the resistive values decrease.

NOTE: Reference page 4-2 of the TroubleshootĆ

ing section for the resistive values of the heating elements. The reading should be taken in a cold state.

3. On a call for heat from the temperature control circuit, a circuit is completed between termiĆ nals #6 and #7 of the temperature control board (4).

NOTE: The temperature control circuit conĆ

sists of the temperature probe (7), the

2-1

OPERATION

FIGURE 1

2-2

MARK V

CE APPROVED COOK ONLY - 33339 REV C

Component Reference

NOTE: Refer to FIGURE 2 page 2-4 for compoĆ

nent locations.

1. MODE SELECTOR SWITCH

2. COOK TIMER

3. DOOR SWITCH

4. TEMPERATURE CONTROL BOARD

5. AXIAL FAN

6. CONVECTION FAN MOTOR

7. TEMPERATURE PROBE

8. SOLID STATE POTENTIOMETER

9. CENTRIFUGAL SWITCH

10. HIGH LIMIT SWITCH

11. ELEMENT CONTACTOR

12. COOK LIGHT

13. HEATING ELEMENTS

14. 50 WATT LAMPS

15. LIGHT SWITCH

16. TIMER MOTOR

17. BUZZER

Operation

2. If the doors are closed the door switch (3) should also be closed sending power to termiĆ nal #6 of the temperature control board (4) and to the convection fan motor (6).

Power is sent out of terminal #7 to one side of the centrifugal switch (9). If the convection fan motor (6) is at full speed the centrifugal switch (9) closes sending power to one side of a high limit switch (10), if the high limit is closed then power will be sent to one side of the contactor (11) and an indicator light (12). When the conĆ tactor closes the heating elements (12) power up.

4. The 50 watt lamps (13) only receive power when the light switch (14) is activated.

NOTE: Put the timer in the home position to siĆ

lence the buzzer.

NOTE: Turn the mode selector switch to cool

down to bypass the door microswitch. This allows the convection fan motor to operate even when the doors are open.

NOTE: This oven may be converted from single to

three phase, however, contactors must be changed due to the difference in amp draw. Reference detail inset in FIGURE 2.

NOTE: Reference page 4-2 of the TroubleshootĆ

ing section for the resistive values of the heating elements. The reading should be taken in a cold state.

NOTE: This motor has a built in centrifugal

switch (9) that closes when the motor reaches full speed. If found faulty do not bypass, the whole motor should be replaced.

3. On a call for heat from the temperature control circuit, a circuit is completed between termiĆ nals #6 and #7 of the temperature control board (4).

NOTE: The temperature control circuit conĆ

sists of the temperature probe (7), the temperature control board (4) and the solid state potentiometer (8).

2-3

OPERATION

FIGURE 2

2-4

MARK V

COOK AND HOLD - 18791

Component Reference

NOTE: Refer to FIGURE 3 page 2-7 for compoĆ

nent locations.

1. MODE SELECTOR SWITCH

2. COOK TIMER

3. COOK TEMPERATURE CONTROL BOARD

4. HOLD TEMPERATURE CONTROL BOARD

5. AXIAL FAN

6. DPDT RELAY COIL

7. DOOR SWITCH

8. CONV ECTION FAN MOTOR

9. TEMPERATURE PROBE

10. SOLID STATE POTENTIOMETER

11. CENTRIFUGAL SWITCH

12. COOK LIGHT

13. ELEMENT CONTACTOR

14. HEATING ELEMENTS

15. TIMER MOTOR

16. BUZZER

17. COOK AND HOLD TIMER

18. COOK AND HOLD LIGHT

19. TEMPERATURE PROBE

20. SOLID STATE POTENTIOMETER

21. 50 WATT LAMPS

22. LIGHT SWITCH

Cook Operation

1. Turn the mode selector switch (1) to the cook position. Power goes to terminal #1 of the cook timer (2), terminals #6 and #8 of the cook temperature control board (3), terminal #8 of the hold temperature control board (4) and the axial fan (5). Power is also applied to the N.C. set of contacts in a DPDT relay (6).

NOTE: The coil of this relay will only be actiĆ

vated when the hold timer is set.

2. If the doors are closed the door switch (7) should also be closed sending power to termiĆ nal #3 of the mode selector switch (1). The mode selector switch should already be made between terminals #3 and N completing the circuit to the convection fan motor (8).

NOTE: This motor has a built in centrifugal

switch (11) that closes when the motor

reaches full speed. If found faulty do not bypass, the whole motor should be replaced.

3. On a call for heat from the cook temperature control system a circuit is completed between terminals #6 and #7 of the temperature conĆ trol board (3).

NOTE: The temperature control system conĆ

sists of the temperature probe (9), the temperature control board (3) and the solid state potentiometer (10)

Power is sent out of terminal #7 to the N.C. terĆ minal of the DPDT relay (6). This relay should be made between the N.C. terminal and the common terminal sending power to one side of the centrifugal switch (11). If the convection fan motor (8) is at full speed the centrifugal switch (11) closes sending power to the cook light (12) and one side of the element contactor (13). When the contactor closes the heating elements (14) power up.

4. When the cook timer (2) is set for a time a cirĆ cuit is made between terminals #1 and #2 powering up the timer motor (15). At the expiĆ ration of the set time the switch in the cook timĆ er (15) toggles from 1-2 to 1-4 powering up the buzzer (16).

NOTE: Put the timer in the home position to siĆ

lence the buzzer.

5. The 50 watt lamps (21) only receive power when the light switch (22) is activated. These lamps are 115 volt and are wired in series parallel.

Cook and Hold Operation

1. Turn the mode selector switch (1) to the cook and hold position. Power goes to terminal #1 of the cook and hold timer (17). When the cook and hold timer is set power goes to terminal #6 of the hold temperature controller (4), the coil of the DPDT relay (6) and the cook and hold light (18). When the DPDT relay powers up the switches in the relay toggle from the N.C. to the N.O. position.

2. On a call for heat from the hold temperature control system, a circuit is completed beween terminals #6 and #7 of the hold temperature control board (4).

2-5

OPERATION

NOTE: The hold temperature control system

consists of the temperature probe (19), the hold temperature control board (4) and the solid state potentiometer (20).

Power goes to the N.O. terminals of the DPDT relay (6). Circuits should be made between the N.O. and common terminals of the DPDT relay (6) allowing power to run to the convection fan motor (8) and one side of the centrifugal switch (11). If the convection fan motor (8) is at full speed the centrifugal switch (11) closes sending power to the cook light (12) and one side of the element contactor (13). When the contactor closes the heating elements (14) power up.

NOTE: In cook and hold mode only, the conĆ

vection fan cycles on and off with the hold thermostat system.

3. The 50 watt lamps (21) only receive power when the light switch (22) is activated. These lamps are 115 volt and are wired in series parallel.

NOTE: The potentiometer and probes for cook

and cook & hold are identical. The cook and cook & hold temperature boards are NOT interchangeable.

NOTE: Turn the mode selector switch to cool

down to bypass the door microswitch. This allows the convection fan motor to operate even when the doors are open.

NOTE: This oven may be converted from single to

three phase, however, contactors must be changed due to the difference in amp draw. Reference detail inset in FIGURE 3.

NOTE: The resistive values for the probes used in

this oven have descending temperature coefficients. As the temperature increases the resistive values decrease.

NOTE: Reference page 4-2 of the TroubleshootĆ

ing section for the reistive values of the heating elements. The reading should be taken in a cold state.

2-6

MARK V

FIGURE 3

2-7

SOLID STATE DIGITAL - 30070 REV B

OPERATION

Component Reference

NOTE: Refer to FIGURE 4 page 2-9 for compoĆ

nent locations.

1. MODE SELECTOR SWITCH

2. DOOR SWITCH

3. TIME AND TEMPERATURE CONTROLLER

4. AXIAL FAN

5. CENTRIFUGAL SWITCH

6. CONVECTION FAN MOTOR

7. HOT AIR ELEMENT CONTACTOR

8. HEATING ELEMENTS

9. TRANSFORMER

10. 50 WATT LAMPS

11. LIGHT SWITCH

Operation

1. Turn the mode selector switch (1) to the cook position. Power goes to one terminal of the door switch (2), terminal J8 of the temperature controller (3), and the axial fan (4). The main blower fan starts. If a temperature is proĆ grammed into the controller, the power goes from J9 to the centrifugal switch (5) in the conĆ vection fan motor (6).

2. If the doors are closed, the door switch (2) should also be closed, sending power to the common terminal of the time and temperature controller (3). The relay on this controller should be closed since a temperature has been programmed into the controller. A circuit is made between common and N.O. sending

power to, and starting the convection fan moĆ tor (6).

NOTE: The relay in the time and temperature

controller is not field repairable. If diagnosed as defective, the entire board must be replaced.

3. When the convection fan motor (6) reaches full speed the centrifugal switch (5) closes sendĆ ing power to the coil of the hot air element conĆ tactor (7). When the contactor closes power is sent to the heating elements (8).

4. The 50 watt lamps (10) only receive power when the light switch (11) is activated. These lamps are 115 volt and are wired in series parallel.

NOTE: Turn the mode selector switch to cool

down to bypass the door microswitch. This allows the convection fan motor to operate even when the doors are open.

NOTE: This oven may be converted from single to

three phase, however, contactors must be changed due to the difference in amp draw. Reference detail inset in FIGURE 4.

NOTE: The resistive values for the probes used in

this oven have descending temperature coefficients. As the temperature increases the resistive values decrease.

NOTE: Reference page 4-2 of the TroubleshootĆ

ing section for the reistive values of the heating elements. The reading should be taken in a cold state.

2-8

MARK V

FIGURE 4

2-9

CE APPROVED SOLID STATE DIGITAL - 33345 REV C

OPERATION

Component Reference

NOTE: Refer to FIGURE 5 page 2-11 for compoĆ

nent locations.

1. MODE SELECTOR SWITCH

2. DOOR SWITCH

3. TIME AND TEMPERATURE CONTROLLER

4. AXIAL FAN

5. CENTRIFUGAL SWITCH

6. CONVECTION FAN MOTOR

7. HIGH LIMIT SWITCH

8. HOT AIR ELEMENT CONTACTOR

9. HEATING ELEMENTS

10. 50 WATT LAMPS

11. LIGHT SWITCH

Operation

4. The 50 watt lamps (10) only receive power when the light switch (11) is activated.

NOTE: Turn the mode selector switch to cool

down to bypass the door microswitch. This allows the convection fan motor to operate even when the doors are open.

NOTE: The resistive values for the probes used in

this oven have descending temperature coefficients. As the temperature increases the resistive values decrease.

2. If the doors are closed, the door switch (2) should also be closed, sending power to the common terminal of the time and temperature controller (3). The relay on this controller should be closed since a temperature has been proĆ grammed into the controller. A circuit is made between common and N.O. sending power to, and starting the convection fan motor (6).

NOTE: The relay in the time and temperature

controller is not field repairable. If diagnosed as defective, the entire board must be replaced.

3. When the convection fan motor (6) reaches full speed the centrifugal switch (5) closes sending power to the high limit (7). If the high limit is closed, power goes to the coil of the hot air eleĆ ment contactor (8). When the contactor closes power is sent to the heating elements (9).

2-10

MARK V

FIGURE 5

2-11

FAN DELAY WITH PULSE PLUS - 18466 REV D

OPERATION

Component Reference

NOTE: Refer to FIGURE 6 page 2-13 for compoĆ

nent locations.

1. MODE SELECTOR SWITCH

2. COOLING FAN

3. TEMPERATURE CONTROLLER

4. 10 MINUTE FAN DELAY TIMER

5. 30 MINUTE COOK TIMER

6. DOOR SWITCH

7. SPDT BLOWER SWITCH

8. CONVECTION FAN MOTOR

9. TEMPERATURE PROBE

10. POTENTIOMETER

11. HOT AIR ELEMENT CONTACTOR

12. COOK LIGHT

13. HOT AIR ELEMENTS

14. REPEAT SHOT PULSE TIMER

15. TPDT RELAY

16. FAN ON LIGHT

17. FAN OFF LIGHT

18. 50 WATT LAMPS

19. LIGHT SWITCH

Operation

1. Turn the mode selector switch (1) to the cook position. Power goes to the cooling fan (2), terĆ minal #8 of the temperature controller (3), and terminal #1 of the ten minute fan delay timer (4).

2. If the ten minute fan delay timer is in the timed out position a switch is made between terminals #1 and #4 sending power to terminal #1 of the thirty minute cook timer (5). Power is also sent to one side of the door switch (6). If the doors are closed the door switch should also be closed sending power to terminal #6 of the temperature control board (3) and the common terminal of a SPDT blower switch (7). The speed of the conĆ vection fan motor (8) is dependant on the posiĆ tion of the SPDT blower switch.

temperature control board (3) and the solid state potentiometer (10)

Power is sent out of terminal #7 to one coil of the hot air element contactor (11) and the cook light (12). When the contactor is energized the hot air element (13) powers up.

4. To enable the pulse plus feature, the ten minĆ ute fan delay timer (4) must be set to a time. A switch is then made between terminals #1 and #2 sending power to terminal #2 of a repeat shot pulse timer (14).

NOTE: By setting the ten minute fan delay timer

(4) power is interrupted to the thirty minĆ ute cook timer (5) making it inoperative.

The repeat shot pulse timer cycles a TPDT relay (15) interrupting the circuit to the convection fan motor (8). The convection fan motor cycles on and off for approximately thirty second intervals for the duration of the time set on the ten minute fan delay timer (4). The fan on light (16) illumiĆ nates whenever the TPDT relay closes. The fan off light (17) illuminates whenever the ten minute fan delay timer is set for a time.

5. The 50 watt lamps (18) only receive power when the light switch (19) is activated. These lamps are 115 volt and are wired in series parallel.

NOTE: Turn the mode selector switch to cool

down to bypass the door microswitch. This allows the convection fan motor to operate even when the doors are open.

NOTE: This oven may be converted from single to

three phase, however, contactors must be changed due to the difference in amp draw. Reference detail inset in FIGURE 6.

NOTE: The resistive values for the probes used in

this oven have descending temperature coefficients. As the temperature increases the resistive values decrease.

3. On a call for heat from the cook temperature control system a circuit is completed between terminals #6 and #7 of the temperature conĆ trol board (3).

NOTE: The temperature control system conĆ

sists of the temperature probe (9), the

2-12

MARK V

FIGURE 6

2-13

HUMIDAIRE - 1846 REV M

OPERATION

Component Reference

NOTE: Refer to FIGURE 7 page 2-16 for compoĆ

nent locations.

1. MODE SELECTOR SWITCH

2. COOK TIMER

3. DOOR SWITCH

4. TEMPERATURE CONTROL BOARD

5. SPDT BLOWER SWITCH

6. SINGLE SHOT TIMER

7. SPST THERMAL SWITCH

8. TEMPERATURE PROBE

9. POTENTIOMETER

10. COOK LIGHT

11. ELEMENT CONTACTOR

12. HEATING ELEMENTS

13. 50 WATT LAMPS

14. LIGHT SWITCH

15. TIMER MOTOR

16. BUZZER

17. STEAM DURATION POTENTIOMETER

18. STEAM CYCLE START SWITCH

19. WATER SOLENOID VALVE

20. STEAM LIGHT

21. CONVECTION FAN

22. AXIAL COOLING FAN

Operation

2. If the doors are closed the door switch (3) should also be closed sending power to terminal #6 of the temperature control board (4), the SPDT blowĆ er switch (5), terminal #1 of a single shot timer (6), and one side of a SPST thermal switch (7).

3. On a call for heat from the temperature control circuit a circuit is completed between terminals #6 and #7 of the temperature control board (4).

NOTE: The temperature control circuit conĆ

sists of the temperature probe (8), the temperature control board (4) and the solid state potentiometer (9).

Power is sent out of terminal #7 sending power to the cook light (10) and one side of the eleĆ ment contactor (11). When the contactor closes the heating elements (12) power up.

4. The 50 watt lamps (13) only receive power when the light switch (14) is activated. These lamps are 115 volt and are wired in series parallel.

NOTE: Put the timer in the home position to siĆ

lence the buzzer.

6. If the oven is above 212_F (100_C) as sensed by the thermal switch (7) the switch closes sending power to the steam cycle start switch (18).

NOTE: The thermal switch is located in the

rear of the oven. The face of the thermal switch is in contact with the oven liner. The switch toggles closed if the oven temperature exceeds 212_F (100_C).

NOTE: The steam cycle start switch is a moĆ

mentary switch located on the front control panel.

When the steam duration potentiometer (17) is set and the steam cycle start switch (18) is pressed the single shot timer (6) is activated for the duration of time on the steam duration poĆ tentiometer. This allows the water solenoid valve (19) to open spraying atomized water onto the blower wheel. The steam light (20) is illuminated during the humidaire cycle.

7. The convection fan (21) receives power from the SPDT blower switch (5). This switch deterĆ mines hi and lo speed.

NOTE: Turn the mode selector switch to cool

down to bypass the door microswitch. This allows the convection fan motor to operate even when the doors are open.

NOTE: This oven may be converted from single to

three phase, however, contactors must be changed due to the difference in amp draw. Reference detail inset in FIGURE 7.

2-14

MARK V

NOTE: The resistive values for the probes used in

this oven have descending temperature coĆ efficients. As the temperature increases the resistive values decrease.

NOTE: Reference page 4-2 of the TroubleshootĆ

ing section for the reistive values of the heating elements. The reading should be taken in a cold state.

2-15

OPERATION

1846M

FIGURE 7

2-16

MARK V

INTELLIHOLD AND INTELLIPLUS - 22027 REV A

Component Reference

NOTE: Refer to FIGURE 8 page 2-18 for compoĆ

nent locations.

1. MODE SELECTOR SWITCH

2. DOOR SWITCH

3. AXIAL FAN

4. TEMPERATURE CONTROL BOARD

5. CONVECTION FAN

6. OVEN READY LIGHT

7. HEATING ELEMENT CONTACTOR

8. HEATING ELEMENTS

9. 50 WATT LAMPS

10. LIGHT SWITCH

11. PROBE

Operation

1. Turn the mode selector switch (1) to the cook position. Power goes to one side of the door switch (2), the axial fan (3) and to either E1 or E2 of the temperature control board (4).

NOTE: This control is multiĆvoltage. It may be

used on 240, 208 and 120. FIGURE 8 shows connections to E1 and E2 indiĆ cating a 240 or 208 volt application.

changed due to the difference in amp draw. Reference detail inset in FIGURE 8.

NOTE: The resistive values for the probe (11) used

in this oven have ascending temperature coefficients. As the temperature increases the resistive values also increase.

NOTE: Reference page 4-2 of the TroubleshootĆ

ing section for the reistive values of the heating elements. The reading should be taken in a cold state.

2. If the doors are closed the door switch (2) should also be closed sending power to termiĆ nal E10 of K2, E8 of K3 and E6 of K1. If a time and temperature is programmed into the conĆ troller either K2 or K3 close sending power to the convection fan (5).

NOTE: K2 is for high fan, K3 is for low fan.

3. On a call for heat the contacts in K1 close, sending power to the oven ready light (6) and one side of the heating element contactor (7). When the contactor closes the heating eleĆ ments (8) power up.

4. The 50 watt lamps (9) only receive power when the light switch (10) is activated. These lamps are 115 volt and are wired in series parallel.

NOTE: Turn the mode selector switch to cool

down to bypass the door microswitch. This allows the convection fan motor to operate even when the doors are open.

NOTE: This oven may be converted from single to

three phase, however, contactors must be

2-17

OPERATION

FIGURE 8

2-18

MARK V

INTELLITOUCH - 19361 REV A

Component Reference

NOTE: Refer to FIGURE 9 page 2-20 for compoĆ

nent locations.

1. MODE SELECTOR SWITCH

2. COOLING FAN

3. DOOR SWITCH

4. STEP DOWN TRANSFORMER

5. INTELLITOUCH CONTROL

6. CONVECTION FAN

7. TEMPERATURE PROBE

8. CENTRIFUGAL SWITCH

9. ELEMENT CONTACTOR

10. HOT AIR ELEMENTS

11. 50 WATT LAMPS

12. LIGHT SWITCH

Operation

1. Turn the mode selector switch (1) to the cook position. Power goes to the cooling fan (2), one side of the door switch (3) and terminal #5 of a 208/24 volt step down transformer (4). 24 volts are applied to terminal #T2 of the intelliĆ touch controller (5).

allows the convection fan motor to operate even when the doors are open.

NOTE: This oven may be converted from single to

three phase, however, contactors must be changed due to the difference in amp draw. Reference detail inset in FIGURE 9.

NOTE: The resistive values for the probes used in

this oven have descending temperature coefficients. As the temperature increases the resistive values decrease.

NOTE: Reference page 4-2 of the TroubleshootĆ

ing section for the reistive values of the heating elements. The reading should be taken in a cold state.

NOTE: To calibrate the oven operation perforĆ

mance characteristics see page 3-8 of the Calibration and Adjustment section.

2. If the doors are closed the door switch should also be closed sending power to the convecĆ tion fan (6).

3. On a call for heat, as sensed by the temperaĆ ture probe (7), a set of contacts close between terminals T2 and T5 sending 24 volts to one side of the centrifugal switch (8).

NOTE: The centrifugal switch is a nonĆrepairĆ

able item. It is located in the convecĆ tion fan motor. This switch closes when the convection fan reaches full speed. It is considered a safety switch and should not be bypassed.

If the centrifugal switch is closed, 24 volts are applied to the coil of the hot air element contacĆ tor (9). When the contactor is energized, the hot air elements (10) power up.

4. The 50 watt lamps (11) only receive power when the light switch (12) is activated. These lamps are 115 volt and are wired in series parallel.

NOTE: Turn the mode selector switch to cool

down to bypass the door microswitch. This

2-19

OPERATION

FIGURE 9

2-20

MARK V

BLODGETT IQ CONTROL - 33078 REV A

Component Reference

NOTE: Refer to FIGURE 10 page 2-22 for compoĆ

nent locations.

1. POWER SWITCH

2. STEP DOWN TRANSFORMER

3. RELAY BOARD

4. AXIAL FAN

5. COMPUTER

6. TEMPERATURE PROBE

7. ELEMENT CONTACTOR

8. HEATING ELEMENTS

9. CONVECTION FAN MOTOR

10. DOOR SWITCH

Operation

1. Toggle the power switch (1) to the on position. Power goes to the primary side of a 208/24 volt step down transformer (2), terminal #2 of K1 of the relay board (3), terminal #4 of K2 of the relay board, terminal #7 of K3 of the relay board and the axial fan (4).

2. On a call for heat from the computer (5) as sensed by the temperature probe (6), the coil of K1 powers up closing the contacts between terminals #2 and #1 of K1 on the relay board (3). The coil of the element contacator (7) powĆ ers up. When the contactor closes the heating elements (8) power up.

NOTE: Reference page 4-2 of the TroubleshootĆ

ing section for the reistive values of the heating elements. The reading should be taken in a cold state.

3. The speed of the convection fan motor (9) is determined by the program in the computer (5). The computer either closes K2 for high speed or K3 for low speed.

4. When the doors are closed the door switch (10) is activated. The computer closes relays K1, K2 and K3. If the doors are open or the switch is broken these relays drop out and the LED displays door.

NOTE: This oven may be converted from single to

three phase, however, contactors must be changed due to the difference in amp draw. Reference detail inset in FIGURE 10.

NOTE: The resistive values for the probes used in

this oven have descending temperature coefficients. As the temperature increases the resistive values decrease

2-21

OPERATION

FIGURE 10

2-22

MARK V

This page intentionally left blank.

2-23

CHAPTER 3

CALIBRATION AND

ADJUSTMENT

MARK V

DOORS

The Mark V ovens feature double side mounted doors which operate simultaneously by means of a chain and turnbuckle linkage assembly. Should field adjustment be necessary, the two turnbuckles are located immediately behind the combustion compartment cover.

For units manufactured prior to August 1984.

1. Adjust one turnbuckle, then the other until the doors are properly synchronized.

NOTE: The doors are properly adjusted if the

right door is fully closed when the left door (the door with the handle) has 1/2"Ć1" of travel remaining.

Both turnbuckles must be adjusted to prevent strain on the door operating mechanism.

2. Tighten the turnbuckle lock nuts.

Turnbuckle

(not shown)

For units manufactured after August 1984

Be sure the doors are in line with each other when viewed from the top and front. If the doors are misaĆ ligned adjust as follows:

1. Remove the bottom trim.

2. Loosen the five (5) bolts in the UĆshaped lower door hinge and sprocket assembly.

3. Slide the assembly until the doors are aligned.

4. Tighten the bolts.

5. Replace the bottom trim.

Door Hinge

Sprocket

Assembly

Turnbuckle

FIGURE 1

To adjust the ball plunger catch:

1. Insert a spanner key in the notches on both sides of the ball plunger. Loosen the lock nut with a wrench.

2. Adjust the ball plunger by turning left or right with the spanner key until the plunger engages in the striker plate on the door.

3. With the spanner key still inserted in the ball plunger notches, tighten the lock nut.

FIGURE 2

To adjust the doors for proper operation, open the doors until the right hand door back flange is even with the front line of the oven as viewed from above. The left hand door should be positioned so the door pressure lock touches the right hand door. If the doors need adjustment proceed as follows:

1. Loosen the chain drive.

2. Adjust for proper location.

3. Tighten the chain drive.

Front of Oven

Left Door

Right Door

Pressure Lock

FIGURE 3

3-1

CALIBRATION AND ADJUSTMENT

DOOR BLOWER SWITCH

The door activated blower switch should be adĆ justed so the doors are about 1Ć1/2" (4 cm) from the liner when the switch shuts the blower off. If field adjustment is necessary, the switch can be reached by removing the combustion compartĆ ment cover.

1. Open the right hand door until it is approxiĆ mately 2" (5 cm) from the liner.

2. Place the arm of the cam assembly, located on the door sprocket, against the push button.

3. Tighten the set screw.

When the doors are fully closed, the cam arm deĆ presses the push button enough to allow blower operation. An audible click will determine if the switches are operating correctly.

The switch may be moved forward or backward in the mounting bracket as necessary for alignment.

Door Arm

Sprockets

Door Chain

Door Switch Cam Assembly

Hinge Pin

Micro Switch

THERMOSTAT

BULB AND CAPILLARY THERMOSTAT

For units manufactured prior to August 1984

1. Turn the mode selector/power switch to COOK ONLY.

2. Toggle the blower switch to ON.

3. Toggle the cool down switch to MANUAL.

4. Place a pyrometer thermocouple at the center of the thermostat bulb or reliable mercury therĆ mometer on the middle shelf 6" from the front edge and in the center of the shelf.

5. Turn the thermostat dial to 350_F (177_C)..

6. When the red indicator light on the control panĆ el goes out, check the thermometer or pyromĆ eter to determine oven temperature.

If this reading is within 10_F (6_C) of the therĆ mostat setting, do not change the thermostat.

If this reading differs more than 10_F (6_C) from the thermostat setting recalibrate the thermostat.

For units manufactured after August 1984.

1. Turn the selector switch to COOK.

2. Place a pyrometer thermocouple at the center of the thermostat bulb or reliable mercury therĆ mometer on the middle shelf 6" (15 cm) from the front edge and in the center of the shelf.

3. Turn the thermostat dial to 350_F (177_C). Let the oven heat for at least 1/2 hour.

FIGURE 4

4. When the red indicator light on the control panĆ el goes out, check the thermometer or pyromĆ eter to determine oven temperature. If this reading is within 10_F (6_C) of the thermostat setting, do not change the thermostat. If this reading differs more than 10_F (6_C) from the thermostat setting recalibrate the thermostat as follows. See FIGURE 6 page 3-3.

A.) Loosen the set screws in the thermostat

knob. Pull the knob forward.

B.) With a screwdriver, turn the calibration

screw in the center of the thermostat stem either clockwise to lower the temperature or counterĆclockwise to raise the temperaĆ ture.

3-2

MARK V

Thermocouple

Bulb Clip

Fluid Filled

Capillary

Thermostat

Pyrometer

Lead

FIGURE 5

For units manufactured prior to December 1987.

1. Loosen the set screws in the thermostat knob. Pull the knob forward.

2. With a screwdriver, turn the calibration screw in the center of the thermostat stem either clockwise to lower the temperature or counterĆ clockwise to raise the temperature.

Calibration

Screw

NOTE: Do not allow the main stem of the therĆ

mostat to turn when adjusting the calĆ ibration screw.

3. Open the doors.

4. Turn the selector switch to COOL DOWN. The blower will continue to operate. Let the temperĆ ature of the oven decrease 100Ć150_F (56Ć83_C).

5. Turn the selector switch to COOK.

6. Repeat the steps above until the oven temperĆ ature is within 10_F (6_C) of the thermostat setĆ ting.

FIGURE 6

3-3

SOLID STATE MANUAL

1. Place a pyrometer in the center of the oven.

2. Turn the mode selector switch to cook.

3. Turn the thermostat to 350_F (177_ C).

4. When the red indicator light goes out, check the pyrometer to determine oven temperature.

5. If this reading is within 10_ (6_C) of the thermoĆ stat setting no adjustment is needed.

If the reading is greater than 10_ (6_C) adjust as follows:

A.) Locate the trim pot on the solid state temĆ

perature board.

CALIBRATION AND ADJUSTMENT

B.) Turn the adjustment screw to raise or lower

the setting.

LIGHT OFF

OVEN READY

THERMOSTAT

TIMER

3-4

FIGURE 7

MARK V

SELECTOR SWITCH CALIBRATION

1. Place a pyrometer in the center of the oven.

2. Turn the mode selector switch to cook.

3. Set 8 position selector switch to one of the eight positions.

NOTE: The 8 individual positions are each set

for a temperature of the customer's choosing. For example, if position 1 is set for 350_F (177_C) the red indicator light should go out when it gets to withĆ in 10 degrees of setpoint.

4. If the light goes out within 10 degrees, no adĆ justment is required. If the light does not go out within 10 degrees of setpoint calibrate the switch as follows:

A.) Locate the potentiometer on the 8 position

selector switch labeled R1.

NOTE: There are 8 trim pots on this device.

They are labeled R1, R2, R3, etc.

B.) Turn the brass screw on top of the potenĆ

tiometer clockwise to increase the temperaĆ ture. Turn the brass screw on top of the poĆ tentiometer counterĆclockwise to decrease the temperature.

5. Repeat steps 3-4 for all 8 positions.

NOTE: It is possible for all 8 positions to be out

of calibration but highly unlikely.

FIGURE 8

3-5

SOLID STATE DIGITAL CONTROL

CALIBRATION AND ADJUSTMENT

To Initiate Programming

1. Set the time to 1 minute.

2. Set the temperature to 151_F (66_C).

To Access Second Level Programming

1. Press and hold the temperature key and the start/stop key simultaneously.

2. The control beeps and displays the software version for a few seconds.

3. The control then displays 2NdL. The control has entered the second level program.

To Change the Temperature Offset

1. Press the temperature key.

2. The control displays OFFS or offset for a few seconds. It then displays the current offset which should be 0_F.

3. Rotate the dial to enter a  50_F (28_C) offset. Use this to calibrate the oven if necessary.

To Set the Display Scales

1. Press the temperature key.

2. The control displays the current setting from the following menu. See FIGURE 9. This menu controls 3 separate parameters:

A.) First Digit - the desired time display (ie

hrs/min or min/sec)

DISPLAY SCALE EXAMPLES

DIGITS

H = Hrs/Min Display (Factory Setting) _Ă = Min/Sec Display

E = Electric Oven _ = Gas Oven

_C or _F Temperature Display

B.) Second Digit - Electric or Gas oven

C.) Third and Fourth Digit - the desired temĆ

perature scale (ie _F or _C)

3. To adjust the setting turn the dial 1 click at a time.

NOTE: If the control is set for minutes and seconds

the first digit will be blank. If the control is set for a gas oven the second digit will be blank.

FIGURE 9

To Return to Normal Operating Mode

1. Press the temperature key.

2. The control goes through self check then disĆ plays the set temperature 151_F (66_C).

3. The oven can now be controlled as normal.

3-6

MARK V

INTELLIHOLD AND INTELLIPLUS CONTROLS

NOTE: For error code display information see

page 4-3 of the Troubleshooting section.

Temperature Calibration

1. Turn the temperature control knob until the temperature in the display reads X10 (any number followed by 10).

2. Turn the time control knob until the time in the display is 00:00.

3. Press and hold the start/timer key. The display reads UPO.

4. Place a pyrometer in the center of the oven to measure the actual oven temperature.

NOTE: During operation, the temperature

control is based on the measured temĆ perature and the temperature offset which is programmed into the control. If the temperature measured in the center of the oven is below the oven setpoint a positive offset is needed. If the temperature measured in the cenĆ ter of the oven is above the oven setĆ point a negative offset is needed.

5. Turn the temperature control knob to set the offset, either positive or negative.

6. Press the act temp key to store the new offset and exit temperature calibration.

Temperature Display Scales

1. Turn the temperature control knob until the temperature in the display reads X20 (any number followed by 20).

2. Turn the time control knob until the time in the display is 00:00.

3. Press and hold the start/timer key. The display reads either CCC or FFF.

4. Press and hold the start/timer key to toggle from _C to _F.

5. Press the act temp key to store the new scale and exit temperature display.

Time Display Scales

1. Turn the temperature control knob until the temperature in the display reads X30 (any number followed by 30).

2. Turn the time control knob until the time in the display is 00:00.

3. Press and hold the start/timer key. The display reads either HRS or MIN.

4. Press and hold the start/timer key to toggle from hours to minutes.

5. Press the act temp key to store the time scale and exit time display.

3-7

INTELLITOUCH CONTROL

CALIBRATION AND ADJUSTMENT

NOTE: For error code display information see

page 4-3 of the Troubleshooting section.

To access 2nd level programming

1. Turn the oven off.

2. Locate the 3 pin header on the bottom right side of the control. Move the jumper from the middle and bottom pins to the middle and top pins exposing the bottom pin.

3. Turn the oven on. The program LED (1) lights.

Programming the 2nd level parameters

1. The #1 LED illuminates.

NOTE: The LED's (3) are located next to the

product and load keys. The LED identiĆ fication numbers (2) are located to the left of the product and load keys. See FIGURE 10.

INTELLITOUCH

HEAT PROGRAM

DISPLAY

PROD

READY

ENTER

TEMP

CNCL

TEMP

TIME

LOAD

NOTE: Use product keys 1Ć7 for numerals 1Ć7.

Use load keys 1Ć3 for numerals 8,9 and 0 respectively.

3. Press the enter key to save the parameter setĆ ting.

4. The #2 LED illuminates

5. Repeat steps 1Ć3 for each parameter. When the final parameter setting is entered and saved the #1 LED illuminates.

LED(s) Parameter Setting

1 Offset 0

2 Hrs/Min timer 0F

1,2 Fahrenheit (0=_F, <1=_C) 0F

3 Proportional 0F

1,3 Integration 1F

2,3 Dead band 3F

1,2,3 Cycle time 12F

4 Minimum on time 3F

1,4 Hi temp alarm 550F

2,4 Ready temp differential 15F

1,2,4 Minimum setpoint 150F

3,4 Maximum setpoint cook 500F

1,3,4 Minimum setpoint hold 0F

2,3,4 Maximum setpoint hold 0F

1,2,3,4 Fan 2 speed 0F

5 Fan rev. 0F

TABLE 1

To exit the 2nd level programming

FIGURE 10

2. Use the product and load keys to enter numeriĆ cal data. See TABLE 1 for correct parameter settings.

1. Turn the oven off.

2. Move the jumper from the middle and top pins to the middle and bottom pins exposing the top pin.

3. Turn the oven on.

3-8

MARK V

INTELLITOUCH II CONTROL

To access 2nd level programming and diagnosĆ tics

1. The display reads SELECT. Press CLEAR 1, 2, 3, 4, 5, 6, ENTER.

2. The display reads CODE-? Press 1, 2, 3, 4, 5, 6 ENTER.

3. The display reads ACCES S.

To run LED diagnostics

1. Press CLEAR 1, 1, 1 ENTER.

2. The control runs selfĆdiagnostics on each LED individually. When all of the LED's light togethĆ er press the CLEAR key.

3. The display flashes EXIT then ACCESS.

To check the software configuration

1. Press CLEAR 1, 2, 3 ENTER.

2. The display lists the software configuration inĆ formation.

3. The display flashes EXIT then ACCESS.

OVEN CALIBRATION

1. Press CLEAR, TEMP, TEMP, TEMP, ENTER.

Temperature display scale

2. The display flashes _ F/_C then MODE-?

3. Press any key to toggle the scale from _F to _C.

4. Press the PROG/ENTER key to lock in new scale.

5. The display flashes T'_F ( or T'_C).

Temperature offset

1. Once the temperature scale has been proĆ grammed, the display flashes either POS *

OFFSET or NEG * OFFSET

NOTE: POS OFFSET is displayed if a value has

been programmed in for a positive offĆ set. NEG OFFSET is displayed if a valĆ ue has been programmed for a negaĆ tive offset. The only time both will be displayed is if a value of 0 has been enĆ tered for both.

2. Enter a value for the desired offset. The display flashes DISPLAY * INTEG?.

3. Press the PROG/ENTER key. The default value of 30 will be displayed.

4. Press the PROG/ENTER key. The display will flash TĆCTRL * INTEG?.

5. Press the PROG/ENTER key. The default value of 10 will be displayed.

6. Press the PROG/ENTER key.

Ready Band

1. The display flashes READY, BAND and POS.

2. Use the numeric keys to enter a value between 1 and 25. Press the PROG/ENTER key.

3. The display flashes READY, BAND and NEG.

4. Use the numeric keys to enter a value between 1 and 25. Press the PROG/ENTER key.

To exit oven calibration

1. The display flashes ACCESS, DONE and EXIT.

2. Press CLEAR, CLEAR, CLEAR.

3. The display flashes REBOOT and SELECT.

3-9

BLODGETT IQ CONTROL

CALIBRATION AND ADJUSTMENT

NOTE: For error code display information see

page 4-3 of the Troubleshooting section.

2ND LEVEL PROGRAMMING

Entering the programming mode

1. Press the prog key. The top display reads CodE.

2. Use the product keys to enter the programĆ ming access code: 4 5 1 2. Press the enter key. The top display reads SYS.

Programming hold

1. Press the scan key. The top display reads Hold. Press the toggle/clear key to toggle beĆ tween YES and no. Press the scan key.

If no is chosen:

A.) The controller advances to programming

the setback mode.

If yes is chosen:

A.) The top display reads AUTO. Press the

toggle/clear key to toggle between YES and no. Press the scan key to enter the deĆ sired hold mode.

B.) The top display reads HOLD. The bottom

display flashes the current hold time. Use the product keys to enter the desired hold time. Press the scan key to enter the new hold time.

C.) The top display reads HOLD. The bottom

display flashes the current hold temperaĆ ture. Use the product keys to enter the deĆ sired hold time. Press the scan key to enter the new hold temperature.

D.) The top display reads FAn. The bottom disĆ

play gives the current fan mode. To change the fan mode press the toggle/ clear key. The bottom display toggles beĆ tween Hi and Lo. Press the scan key to enĆ ter the new fan mode and continue with programming the setback mode.

Programming the setback mode

1. The top display reads SEtb. The bottom disĆ play gives the setback mode. To change the setback press the toggle/clear key. The botĆ tom display toggles between YES and no. Press the scan key.

If no is chosen:

A.) The controller advances to programming

the temperature mode.

If yes is chosen:

A.) The bottom display gives the current setĆ

back time. Use the product keys to the enĆ ter the desired setback time. Press the scan key to enter the new setback time.

B.) The bottom display gives the current setĆ

back temperature. Use the product keys to the enter the desired setback temperaĆ ture. Press the scan key to enter the new setback and continue with programming the temperature mode.

Programming the temperature mode (_F or _C)

1. The top display reads dEg. The bottom display gives the units. To change the units press the toggle/clear key. The bottom display toggles between F and C.

2. Press the scan key to enter the new temperaĆ ture units and continue programming the oven size.

Programming the oven size

1. The top display reads APPL. The bottom disĆ play reads either FULL or HALF. Press the toggle/clear key until the bottom display reads FULL for the Mark V.

2. Press the scan key to enter the oven size and continue with exiting the programming mode.

Exiting the programming mode

1. The top display reads SYS. Press the prog key. The control returns to the operating standby mode.

3-10

MARK V

PROGRAMMING THE OFFSET

Entering the offset programming mode

1. Press the prog key. The top display reads CodE.

2. Use the product keys to enter the offset proĆ gramming access code: 4 5 2 3. Press the enĆ ter key. The top display reads oFF. The bottom display reads SEt.

Programming the temperature offset

1. Press the scan key. The top display reads

oFST. The bottom display reads either xxF or

-xxF.

2. Press the toggle/clear key to toggle between positive and negative. Use the product keys to the enter the desired temperature offset.

3. Press the scan key to enter the new temperaĆ ture offset.

Exiting the offset programming mode

1. Press the prog key. The control returns to the operating standby mode.

3-11

CALIBRATION AND ADJUSTMENT

BLODGETT IQ2T CONTROL FACTORY LEVEL PROGRAMMING

Entering the programming mode

1. Press the program key. The top display reads CodE.

2. Use the product keys to enter the factory proĆ gramming accss code: 4 5 2 3. Press the enter key. The top dislay reads Fact.

Programming the oven configuration

1. Press the SCAN KEY. The display reads Appl.

2. Press the TOGGLE/CLEAR KEY to toggle beĆ tween electric oven and gas oven. Set the choice for the oven type. Press the SCAN KEY to enter the choice.

3. Press the TOGGLE/CLEAR KEY to toggle beĆ tween half sized or full sized oven. Set the choice for the oven type. Press the SCAN KEY to enter the choice.

NOTE: Mark V and DFGĆ100 are full sized

ovens. CTB and DFGĆ50 are half sized ovens.

Programming the temperature offset

1. The top display reads oFF. The bottom display reads SEt.

2. Press the SCAN KEY. The top display reads oFST. The bottom display reads either xxF or -xxF.

3. Press the TOGGLE/CLEAR KEY to toggle beĆ tween positive and negative. Use the product keys to the enter the desired temperature offset.

4. Press the SCAN KEY to enter the new temperaĆ ture offset.

Enabling/Disabling the fan error detection circuit

1. The top display reads FanC. The bottom disĆ play reads YES or NO.

2. Press the TOGGLE/CLEAR KEY to toggle beĆ tween choices.

3. Press scan to move to next operating parameĆ ter.

Programming fan speed option

1. The top display reads FanS. The bottom disĆ play reads 1 or 2.

2. Press the TOGGLE/CLEAR KEY to toggle beĆ tween choices: 1 for a single speed motor or 2 for a two speed motor.

3. Press SCAN to move to the next operating paĆ rameter.

Programming the maximum temperature setpoint

1. The top display reads tELt (temperature limit) and the bottom display reads either 500 or 550.

2. Press the TOGGLE/CLEAR key to toggle beĆ tween choices 500_F or 550_F maximum temĆ perature setting.

3. Press scan to enter the maximum setpoint temperature.

NOTE: Use 500_F for the DFGĆ100, DFGĆ200,

Mark V, CTB and DFGĆ50. Use 550_F for the DFGĆ100 XCEL and Mark V XCEL.

Exiting the factory programming mode

1. The top display reads Fact. Press the PROG KEY. The control returns to the operating mode.

3-12

MARK V

IQ VVCĆ208 CONTROL

COMPONENT DESCRIPTION

1. Indicator Lights

2. ProgramĆ ming Buttons

D Light up when product

key is activated.

D Used to access programĆ

ming mode and change parameters.

3. VFD (VacuĆ um Fluorescent Display)

D Bright blue for easy viewĆ

ing. Displays programming and cook cycle information.

4. SlideĆIn Menu Strips

D Menu items are printed

directly on easyĆtoĆ change menu strip.

5. Product Buttons

D Used to activate cook

cycles and for certain programming functions.

6. SCAN key D Used for recipe review during idle.

D Used to review time

remaining during multiple cooks (press & hold)

7. COOL

DOWN key

D Used to enter or exit cool

down mode.

8. TEMP/

TOGGLE CLEAR key

D Used to check actual

temperature; also used to clear value when in programming mode.

9. HOLD key D Holds are not used for KFC applications. Used to toggle between upper and lower case letters when programming libraries.

10. SETBACK

key

11. SCK LINK

logo

D Used to enter or exit

Setback mode.

D Signifies your control is

communicationsĆcapaĆ ble.

FIGURE 11

3-13

OPERATIONAL TEST PROCEDURE

CALIBRATION AND ADJUSTMENT

1 2

5 6

RECIPE REVIEW - Quickly see what is proĆ

grammed for each product key.

1. Press the SCAN key.

2. Select any product key previously proĆ grammedĆLED will be lit above the key.

Plug oven into electrical source

Turn the oven power switch on.

NOTE: AP and Mark V computer is unpowered if off. The XCEL is powered if plugged in.

NOTE: This scrolling can be bypassed by pressing SCAN.

The controller will scroll through the following:

A.) Appliance Type B.) Software # C.) Download # D.) SCK Address E.) PREHEAT"

The oven will enter PREHEAT" mode and begin to warm up. When the set temperature (default 325°F) is reached, the Preheat timer will count down from 45 minutes to zero. When LOAD" is displayed, the oven is ready for use.

Press any illuminated product key.

The cook cycle will count down in the display.

COOL DOWN

1. To enter Cool Down, press the COOL DOWN key while the oven door is closed. When the display reads COOL," the door can then be opened.

3. Press the DOWN arrow key to scroll through the list.

4. Press SCAN to exit.

VIEW TEMPERATURE SETTING

1. Press the TEMP key 'once' to view Actual TemĆ perature, or

2. Press the TEMP key 'twice' to view Set TemperĆ ature.

3. Press the TEMP key 'three' times to view Fan Speed

4. Press the TEMP key 'four' times to view Fan DiĆ rection

WARNING!! THE FAN IS STILL MOVING. DO NOT

REACH INTO THE OVEN. The fan will auĆ tomatically shut off when the actual temĆ perature reaches 105°F.

2. To exit Cool Down, press the COOL DOWN key again. The oven will come back up to set temĆ perature.

WARNING!! ALWAYS TURN OFF MAIN POWER BEĆ

FORE REMOVING BAFFLE OR PLACING HANDS NEAR FAN.

3-14

MARK V

SYSTEM PROGRAMMING (6647)

KEY PRESS DISPLAY ACTION

Enter Program mode

Enter pass code

ENTER CODE

****

D To enter programming mode,

press and hold the P" key for 3 seconds.

D Scroll Down to Programming.

D Press the P" key to lock in

your entry.

D The display will prompt user to

enter a pass code.

D Enter pass code 6 6 4 7.

D Press the P" key when SysĆ

tem" is displayed.

D Press the P" key again to enĆ

ter System Programming.

Confirm or Select Appliance Type

Select Language

APPLIANCE TYPE

(ELECTRIC HALF,

ELECTRIC FULL)

HALF = AP

FULL = MARK V

SELECT LANGUAGE

(English, Other)

D Press the LEFT or RIGHT arrow

keys to select from a preĆproĆ grammed list of appliances.

NOTE: Changing appliance type clears all current recipe programs.

D Press the P" key to lock in

your entry

D Press the LEFT or RIGHT arĆ

row key to select language

D Press the P" key to lock in

your entry

NOTE: 'Other' is downloadĆ able.

3-15

SYSTEM PROGRAMMING (continued)

KEY PRESS DISPLAY ACTION

CALIBRATION AND ADJUSTMENT

Set Tone Level

Set Temperature Mode

Program Setback Time

Program Setback Temperature

TONE LEVEL

(None, 1, 2, 3, 4)

TEMPERATURE

F = FAHRENHEIT or

C = CELSIUS

SETBACK TIME

HH:MM

SETBACK TEMP

XXX

D Press the LEFT or RIGHT arĆ

row keys to select a tone level. At each level the controller will continuously sound the seĆ lected tone.

D Press the P" key to lock in

your entry

D Press the LEFT or RIGHT arĆ

row keys to select the method that all temperatures will be displayed in.

D Press the P" key to lock in

your entry

D Press the numbered product

keys to select the time in HH:MM format for activating Setback mode.

NOTE: 0:00 is default to disĆ

able Setback.

D Press the P" key to lock in

your entry

D Press the numbered product

keys to select the Setback temperature in the range of 140Ć300°F.

Set Hold Time

Set Hold Temperature

HOLD TIME

HH:MM

HOLD TEMP

XXX

3-16

D Press the P" key to lock in

your entry

D Type in the length of hold time

required. The value is in the range of 00:00 to 99:59.

D Press the P" key to advance

to the next stage or parameter.

D Type in the desired Hold temĆ

perature. Hold Temperature Range is 140Ć210°F

D Press the P" key to advance

to the next stage or parameter.

MARK V

SYSTEM PROGRAMMING (continued)

KEY PRESS DISPLAY ACTION

Set Hold Done

Set Hold Fan Speed

Set Preheat Time

HOLD DONE

(AUTOMATIC, MANUAL)

HOLD FAN SPEED

(HIGH, LOW)

PREHEAT TIME

MM:SS

EXITExit Program Mode

D Press the LEFT or RIGHT arĆ

row keys to select Hold Done.

D Press the P" key to advance

to the next stage or parameter.

D Press the LEFT or RIGHT arĆ

row keys to select Hold Fan Speed.

D Press the P" key to advance

to the next stage or parameter.

D Type in the desired Preheat

Time.

D Press the P" key to advance

to the next stage or parameter.

D Press the UP or DOWN arrow

keys to scroll to Exit."

D Press the P" key to return to

idle mode.

3-17

CALIBRATION AND ADJUSTMENT

PROBE RESISTANCE VS HEATING ELEMENTS

Element Resistance

208 volt 12.3-13.6 W 220 volt 13.8-15.2 W 240 volt 16.4-18.1 W 440 volt 58.0-61.0 W 480 volt 65.6-72.6 W

TABLE 2

PROBE RESISTANCE VS TEMPERATURE

Solid State Manual and Digital Controllers (probe P/N 18588)

_F _C Ohms _F _C Ohms

100 38 53029 310 155 1519 125 52 30785 320 160 1340 150 66 18591 330 166 1186 175 80 11633 340 171 1052 200 93 7528 350 177 936 210 99 6391 360 182 835 220 105 5471 370 188 747 230 110 4705 380 193 669 240 116 4030 390 199 601 250 121 3441 400 205 542 260 127 2967 425 219 421 270 132 2583 450 232 333 280 138 2255 475 246 265 290 143 1970 500 260 216 300 149 1728

Intellitouch II Controller (probe P/N 32289)

_F _C Ohms _F _C Ohms

32 0 500 212 100 693 68 20 539 250 120 730 75 24 545 300 150 787

86 30 558 356 180 842 125 50 597 392 200 879 140 60 616 450 230 934 175 80 655 500 260 989 200 93 680 554 260 1042

TABLE 3

TABLE 4

3-18

MARK V

Intellitouch (probe P/N 20360) and Blodgett IQ Controllers (probe P/N 33074

_F _C Ohms _F _C Ohms

60 16 1059 235 113 1422 65 18 1067 240 116 1432 70 21 1080 245 118 1442 75 24 1090 250 121 1453 80 27 1099 255 124 1463 85 29 1112 260 127 1473 90 32 1122 265 130 1483

95 35 1133 270 132 1493 100 38 1143 275 135 1503 105 41 1153 280 138 1514 110 43 1164 290 143 1534 115 46 1174 295 146 1544 120 49 1185 300 149 1554 125 52 1195 305 152 1564 130 55 1206 310 155 1574 135 57 1216 315 157 1584 140 60 1226 320 160 1594 145 63 1237 325 163 1604 150 66 1247 330 166 1614 155 68 1258 335 169 1624 160 71 1268 340 171 1634 165 74 1278 345 174 1644 170 77 1289 350 177 1654 175 80 1299 355 180 1664 180 82 1309 360 182 1674 185 85 1320 365 185 1684 190 88 1330 370 188 1694 200 93 1350 375 191 1704 205 96 1361 380 193 1714 210 99 1371 385 196 1724 215 102 1381 390 199 1734 220 105 1391 395 202 1744 225 107 1402 400 205 1754 230 110 1412 405 207 1764

Intellitouch (probe P/N 20360) and Blodgett IQ Controllers (probe P/N 33074

_F _C Ohms _F _C Ohms

410 210 1774 460 238 1872 415 213 1783 465 241 1882 420 216 1793 470 244 1892 425 219 1803 475 246 1901 430 221 1813 480 249 1911 435 224 1823 485 252 1921 440 227 1833 490 254 1931 445 230 1843 495 255 1940 450 232 1852 500 260 1950 455 235 1862

TABLE 5

3-19

CALIBRATION AND ADJUSTMENT

Intellihold and Intelliplus Controllers (probe P/N 23392)

_F Ohms _F Ohms _F Ohms _F Ohms _F Ohms _F Ohms

70 1080 108 1160 146 1239 184 1318 222 1395 260 1473 71 1082 109 1162 147 1241 185 1320 223 1398 261 1475 72 1084 110 1164 148 1243 186 1322 224 1400 262 1477 73 1086 111 1166 149 1245 187 1324 225 1402 263 1479 74 1089 112 1168 150 1247 188 1326 226 1404 264 1481 75 1091 113 1170 151 1249 189 1328 227 1406 265 1483 76 1093 114 1172 152 1251 190 1330 228 1408 266 1485 77 1095 115 1174 153 1253 191 1332 229 1410 267 1487 78 1097 116 1176 154 1255 192 1334 230 1412 268 1489 79 1099 117 1178 155 1258 193 1336 231 1414 269 1491 80 1101 118 1181 156 1260 194 1338 232 1416 270 1493 81 1103 119 1183 157 1262 195 1340 233 1418 271 1495 82 1105 120 1185 158 1264 196 1342 234 1420 272 1497 83 1108 121 1187 159 1266 197 1344 235 1422 273 1499 84 1110 122 1189 160 1268 198 1346 236 1424 274 1501 85 1112 123 1191 161 1270 199 1348 237 1426 275 1503 86 1114 124 1193 162 1272 200 1350 238 1428 276 1505 87 1116 125 1195 163 1274 201 1352 239 1430 277 1507 88 1118 126 1197 164 1276 202 1354 240 1432 278 1589 89 1120 127 1199 165 1278 203 1357 241 1434 279 1512 90 1122 128 1201 166 1280 204 1359 242 1436 280 1514 91 1124 129 1203 167 1282 205 1361 243 1438 281 1516 92 1126 130 1206 168 1284 206 1363 244 1440 282 1518 93 1128 131 1208 169 1287 207 1365 245 1442 283 1520 94 1131 132 1210 170 1289 208 1367 246 1444 284 1522 95 1133 133 1212 171 1291 209 1369 247 1447 285 1524 96 1135 134 1214 172 1293 210 1371 248 1449 286 1526 97 1137 135 1216 173 1295 211 1373 249 1451 287 1528 98 1139 136 1218 174 1297 212 1375 250 1453 288 1530

99 1141 137 1220 175 1299 213 1377 251 1455 289 1532 100 1143 138 1222 176 1301 214 1379 252 1457 290 1534 101 1145 139 1224 177 1303 215 1381 253 1459 291 1536 102 1147 140 1226 178 1305 216 1383 254 1461 292 1538 103 1149 141 1229 179 1307 217 1385 255 1463 293 1540 104 1151 142 1231 180 1309 218 1387 256 1465 294 1542 105 1153 143 1233 181 1311 219 1389 257 1467 295 1544 106 1156 144 1235 182 1313 220 1391 258 1469 296 1546 107 1158 145 1237 183 1315 221 1393 259 1471 297 1548

3-20

MARK V

Intellihold and Intelliplus Controllers (probe P/N 23392)

_F Ohms _F Ohms _F Ohms _F Ohms _F Ohms _F Ohms

298 1550 335 1624 372 1698 409 1772 446 1845 483 1917 299 1552 336 1626 373 1700 410 1774 447 1846 484 1919 300 1554 337 1628 374 1702 411 1776 448 1848 485 1921 301 1556 338 1630 375 1704 412 1778 449 1850 486 1923 302 1558 339 1632 376 1706 413 1780 450 1852 487 1925 303 1560 340 1634 377 1708 414 1782 451 1854 488 1927 304 1562 341 1636 378 1710 415 1783 452 1856 489 1929 305 1564 342 1638 379 1712 416 1785 453 1858 490 1931 306 1566 343 1640 380 1714 417 1787 454 1860 491 1932 307 1568 344 1642 381 1716 418 1789 455 1862 492 1934 308 1570 345 1644 382 1718 419 1791 456 1864 493 1936 309 1572 346 1646 383 1720 420 1793 457 1866 494 1938 310 1574 347 1648 384 1722 421 1795 458 1868 495 1940 311 1576 348 1650 385 1724 422 1797 459 1870 496 1942 312 1578 349 1652 386 1726 423 1799 460 1872 497 1944 313 1580 350 1654 387 1728 424 1801 461 1874 498 1946 314 1582 351 1656 388 1730 425 1803 462 1876 499 1948 315 1584 352 1658 389 1732 426 1805 463 1878 500 1950 316 1586 353 1660 390 1734 427 1807 464 1880 501 1952 317 1588 354 1662 391 1736 428 1809 465 1882 502 1954 318 1590 355 1664 392 1738 429 1811 466 1884 503 1956 319 1592 356 1666 393 1740 430 1813 467 1886 504 1958 320 1594 357 1668 394 1742 431 1815 468 1888 505 1960 321 1596 358 1670 395 1744 432 1817 469 1890 506 1962 322 1598 359 1672 396 1746 433 1819 470 1892 507 1964 323 1600 360 1674 397 1748 434 1821 471 1893 508 1966 324 1602 361 1676 398 1750 435 1823 472 1895 509 1967 325 1604 362 1678 399 1752 436 1825 473 1897 326 1606 363 1680 400 1754 437 1827 474 1899 327 1608 364 1682 401 1756 438 1829 475 1901 328 1610 365 1684 402 1758 439 1831 476 1903 329 1612 366 1685 403 1760 440 1833 477 1905 330 1614 367 1688 404 1762 441 1835 478 1907 331 1616 368 1690 405 1764 442 1837 479 1909 332 1618 369 1692 406 1766 443 1839 480 1911 333 1620 370 1694 407 1769 444 1841 481 1913 334 1622 371 1696 408 1770 445 1843 482 1915

TABLE 6

3-21

CALIBRATION AND ADJUSTMENT

This page intentionally left blank.

3-22

CHAPTER 4

TROUBLESHOOTING

MARK V

HEAT SYSTEM

POSSIBLE CAUSE(S) SUGGESTED REMEDY

Symptom #1 - Oven heaters and motor do not run

D Oven not plugged in.

D Circuit breaker tripped.

D Plug in oven.

D Reset breaker, check amp draw. Reference electriĆ

cal specifications on page NO TAG of the IntroducĆ

D Doors not closed tightly.

D 10 amp fuse on control panel may be blown.

D Door switch inoperative.

D Mode selector switch inoperative.

D If control configuration has fan delay pulse plus

feature, this feature may be activated.

D If control configuration has a cycle feature this

feature may be activated.

D Convection motor out due to thermal overload.

tion.

D Close doors tightly.

D Replace the fuse and check for shorts.

D Replace door switch.

D Replace mode switch.

D Deactivate fan delay pulse plus.

D Deactivate the cycle feature.

D Check for external heat against the motor. (such as

improper flue connectors on double stack unit.

D Check for motor overamping. Replace the motor.

Symptom #2 - Convection fan motor does not operate

D Oven is not plugged in

D Oven not set to cook mode.

D Plug in oven.

D Turn oven mode switch to on.

D Circuit breaker tripped.

D Door switch inoperative.

D Motor off due to thermal overload.

D If control configuration has standard fan delay

pulse plus feature, this feature may be activated.

D If control configuration has solid state digital conĆ

trols with pulse or cycle feature, this feature may be activated.

D Reset circuit breaker and check the amp draw.

Reference electrical specifications on page NO TAG of the Introduction.

D Replace door switch.

D Check for external heat on the motor.

D On double stacked units check that the flue conĆ

nector is properly installed.

D Check the amp draw. If too high, replace the moĆ

tor.

D Deactivate fan delay pulse plus feature.

D Deactivate the pulse or cycle feature.

4-1

POSSIBLE CAUSE(S) SUGGESTED REMEDY

Symptom #3 - Heat system does not recover quickly

TROUBLESHOOTING

D One, two or all three of the elements are bad.

208 volt = 12.3-13.6 W 220 volt = 13.8-15.2 W

D Replace bank of elements. Reference electrical

specifications on page NO TAG of the IntroducĆ

tion for amp draw. 240 volt = 16.4-18.1 W 440 volt = 58.0-61.0 W 480 volt = 65.6-72.6 W

D Dropped a phase from circuit breaker at electriĆ

cal panel.

D Check for voltage at the terminal block in the

oven across L1-L2, L2-L3, and L1-L3. The

voltage should match the supply to the building.

D Dropped phase at contactor.

D If voltage is not present across any phase call the

electrician. Check for voltage at the contactor on

terminals T1-T2, T2-T3 and T1-T3. Make sure

the appliance is calling for heat. If voltage is not

present across any phase, replace the contactor.

D The oven is out of calibration.

D Reference the calibration procedures for the conĆ

troller configuration on your appliance. See

pages 3-2 through 3-11 of the Calibration and

Adjustment section.

D Inadequate voltage supplied for oven configuraĆ

tion. (ie. 240 volt oven in a 208 volt environment)

D Change the element configuration to match the

incoming voltage. Transformers may also need

to be added for some applications.

Symptom #4 - Heat system does not heat, but motor operates

D Temperature controller set point below actual.

D Probe shorted or open.

D Raise set point.

D Take the resistance reading. Reference pages

3-18 through 3-21 of the Calibration and AdjustĆ

ment section for probe resistance information. ReĆ

fer to page 2-2 for wiring diagram P/N 18459.

For solid state manual controls, remove the wires

on terminals #6 and #7 on the solid state board.

Touch the wires together to allow the contactor to

power up. If the contactor closes, the problem is

in the temperature control circuit (consisting of

the board, probe and potentiometer). This is only

a test. DO NOT leave the oven during this test.

If the contactor closes place an ohm meter across

the probe wire. Note the resistance reading of the

probe as the temperature in the oven increases. At

no time should the probe go infinite or open before

the oven reaches 500_F (260_C). If it does the

probe is bad and should be replaced.

4-2

MARK V

POSSIBLE CAUSE(S) SUGGESTED REMEDY

D Potentiometer is bad.

D Temperature control board is bad.

DISPLAY ERROR CODES

INTELLITOUCH

D The potentiometer is approximately 900W and

can also be tested with an ohm meter. Connect

the test leads to the two outside wires of the poĆ

tentiometer to get the value of the pot. Leave one

lead connected to the outer wire of the potenĆ

tiometer. Move the other lead to the middle wire

of the potentiometer. To check the variable resistĆ

ance, turn the stem clockwise or counter clockĆ

wise. The reading should change from 0W to the

full value of the potentiometer.

Move the test lead from the outer wire to the other

outer wire of the potentiometer. Leave the middle

lead connected to your meter. Turn the stem

again to see the reverse effect.

D If both the probe and the pot are good and the the

heating system does not work the temperature

control board must be bad. Replace the board.

TABLE 1

BLODGETT IQ CONTROL

HELP the temperature setting exceeds the maxiĆ

mum setting of 550_F. This will be shown as an alternating HELP and PROB display.

PROB 1. Defective temperature probe.

2. Stripped insulation on probe wires.

3. Poor connection of probe terminals.

4. Probe sensing temperatures above or below the probe sensing range.

8888 an Intellitouch computer failure.

INTELLIHOLD AND INTELLIPLUS

F2 Actual oven temperature is greater than the

maximum temperature setpoint

F3 Open temperature sensor F4 Shorted temperature sensor while the conĆ

trol is in the cook mode.

F6 The 50/60 Hz input does not change states. F7 Total chain timer over 24 hours F8 The calculated EEPROM check sum is not

the same as the expected check sum reĆ trieved from the EEPROM.

NOTE: The error codes will appear in the top disĆ

play. All error codes are accompanied by an audible alarm.

Hi Oven temperature is more than

40_F above the highest setpoint.

Prob Probe failure at greater than 693_F. Probe (with alarm) - shorted temperture

probe.

HEAT ERR From a cool start (below 140_F), the

oven takes more than 10 minutes to climb from 150Ć300_F.

FAN ERR Control thinks motor is not operating FAN C ERR usually occurs when dirt or grease

collects on the veins of the blower wheel causing centrifugal switch to remain closed too long.

DOOR OPEN Occurs when a timer is activated

and the door is open. This fault self clears once the door is closed.

4-3

CHAPTER 5

PARTS REPLACEMENT

MARK V

DOOR ASSEMBLY

DOOR

1. Open the door. Remove the handle from the left hand door.

2. Remove the three (3) machine screws located along the bottom edge of the door.

3. Lift the door slightly. Pull forward until it clears the support.

4. To remove from the oven, pull the door down until the hinge pin is clear.

5. Reverse steps 1-4 to replace.

Sprocket

DOOR ARM SUPPORT ASSEMBLY

Replacement

1. Remove the trim cover.

2. Remove the doors as described.

3. Remove the five bolts holding the door arm support to the oven frame.

4. Remove and replace the door arm assembly.

Rebuilding

The door arm support assembly contains five reĆ placeable parts.

D Chain and Turnbuckle

D Left Hand Door Arm

D Right Hand Door Arm

D Sprockets

D Door Switch Cam

Use the following steps to rebuild a door arm supĆ port assembly.

1. Remove the assembly from the oven as deĆ scribed.

Turnbuckle

Sprocket

FIGURE 1

2. Remove the spiral pins from the left hand door arm support and sprocket assembly. Remove the left hand door arm support from the sprocket assembly.

Repeat for the right hand door.

3. Install the new parts as needed.

4. Reverse this procedure to install the assembly.

5-1

PARTS REPLACEMENT

WINDOW ASSEMBLY

1. Remove the door as described. Place the door on a flat surface with the front facing up.

2. Remove the outer door skin. Turn the door onto its back.

3. Use the window insertion tool to pry up the corĆ ners of the window assembly in the following order:

A.) Bottom right (farthest from the hinge pin)

B.) Bottom left

C.) Top right

D.) Top left (closest to the hinge pin)

NOTE: The window insertion tool is provided

with the window assembly.

4. Use the window insertion tool to pry up the corĆ ners of the window assembly.

5. Reverse steps 1-4 to replace.

NOTE: To install the door front start at the corĆ

ner closest to the hinge pin.

COMPARTMENT LINER BOTTOM

1. Remove the racks, rack supports and blower wheel cover.

2. Remove the bottom perimeter door gasket.

3. Remove the screws securing the front, back and sides of the liner bottom.

4. Pull the compartment liner bottom forward.

5. Reverse steps 1-4 to replace.

Compartment

Liner Bottom

FIGURE 2

FIGURE 1

Hinge Pin

Window Insertion Tool

5-2

MARK V

MOTOR AND BLOWER ASSEMBLY

BLOWER WHEEL

For units with built in wheel puller:

1. Remove the racks and rack supports.

2. Remove the blower wheel cover.

3. Loosen the set screws in the blower wheel hub. See FIGURE 3.

4. Screw a 3/8"Ć16 bolt into the threaded hole of the blower wheel. Draw the wheel forward from the shaft. See FIGURE 3.

5. Lubricate the motor shaft with graphite. MainĆ tain a 1/8" gap between the back of the blower wheel and the back wall of the oven liner.

6. Reverse steps 1-5 to replace.

For wheels with slot on hub:

1. Use a wheel puller.

MOTOR

If access to the rear of the oven is available:

1. Remove the blower wheel.

2. Loosen the motor attachment bolts.

3. Remove the motor conduit.

4. Lift the motor from the mounting bracket.

5. Reverse steps 1-4 to replace.

If access to the rear of the oven is not available:

1. Remove the blower wheel.

2. Pull the lower heat collector forward and down.

3. Remove the eight (8) 1/4" nuts from the motor panel.

4. Pull the motor panel forward into the oven. DisĆ connect the motor wiring conduit.

5. Reverse steps 1-4 to replace.

3/8" Bolt

See View A

Set Screw

Motor

Blower Wheel

3/8" Bolt

View A

FIGURE 3

5-3

ELECTRICAL COMPONENTS

PARTS REPLACEMENT

NOTE: A test cord is available to allow removal of

the control module from the oven while reĆ taining electrical connections.

BULB AND CAPILLARY THERMOSTAT

1. Remove the chain and turnbuckle compartĆ ment cover.

2. Remove the control compartment cover.

3. Remove the racks.

4. Remove the thermostat capillary bulb clips.

5. Swing the capillary bulb forward until it is at a 90_ angle with the liner side.

6. Close the doors. Pull the control module forĆ ward.

7. Remove the wires from the thermostat.

8. Loosen the set screw at the bottom of the therĆ mostat knob. Remove the knob.

9. Remove the two (2) screws securing the therĆ mostat to the front panel.

10. Feed the capillaries through the oven wall and the side of the control module.

11. Remove the thermostat.

12. Reverse steps 1-11 to replace.

NOTE: Be careful not to kink the fine tubing of the

thermostat capillary.

ELECTRICAL COMPONENTS LOCATED IN THE CONTROL MODULE

1. Remove the chain and turnbuckle compartĆ ment cover.

2. Remove the control compartment cover.

3. Close the doors. Pull the control module forĆ ward.

4. Remove the wires from the defective compoĆ nent.

5. Loosen the screws attaching the component to the control module.

Switches may be removed by depressing the spring loaded clips.

The one hour timer is removed by loosening the locknut.

6. Reverse steps 1-5 to replace.

NOTE: Refer to the wiring diagram to ensure corĆ

rect connection of the wires.

DOOR SWITCH

1. Remove the lower trim cover.

2. Loosen the cam assembly set screw on the right door sprocket assembly.

3. Remove the wires from the door switch.

4. Loosen the lock nut securing the door switch to the bracket and remove.

FIGURE 4

5. Reverse steps 1-4 to replace.

Capillary Tube

Micro Switch

FIGURE 5

5-4

MARK V

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5-5

Blodgett MARK V 111-H Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual