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Frymaster L.L.C., 8700 Line Avenue 71106, P.O. Box 51000, Shreveport, Louisiana 71135-1000 

318-865-1711       FAX 318-862-2394 

 

Printed in the United States Service 

Hotline 

Page 

7

  

 1-800-24-FRYER 

 

 

 

 

Press 

 to turn on the computer. 

The display will read 

— LO — 

until both heaters are 

within 15

°

F of setpoint

 

 

NOTE: A small LED will light in the display when either the heater plate or air heater is 
energized.  

 

 

 

 
When the HLZ is ready for operation, the display reads REdY (ready).  Place product in the 
HLZ in accordance with the restaurant’s established procedures. 

NOTE: To check the 

actual

 temperature of a heater, press the corresponding Temperature 

Switch once.  To check the 

setpoint

 temperature of a heater, press the switch twice (an 

indicator will light when the setpoint is displayed). 

 

 

 

 

 

 

 

 

 

 

R  E  

y

Heater Plate 

Air Heater 

2 2 0

Setpoint 
Temperature 

 

d

 

¡

Summary of Contents for Heated Landing Zone HLZ 18

Page 1: ...TED LANDING ZONE 1 1 2 PARTS RETURN 1 1 3 WARRANTY EXCLUSIONS 1 2 PARTS ORDERING AND SERVICE INFORMATION 2 3 HEATED LANDING ZONE 3 4 INSTALLATION SETUP 3 5 OPERATION 3 6 HLZ MODEL COMPONENT IDENTIFICA...

Page 2: ...L SERVICE AND ACCESS PANELS ARE IN PLACE AND PROPERLY SECURED DO NOT ATTEMPT TO REPAIR OR REPLACE ANY COMPONENT OF THE HLZ SERIES UNLESS ALL POWER TO THE UNIT HAS BEEN DISCONNECTED USE CAUTION WHEN SE...

Page 3: ...repair failure to follow proper installation instructions and or scheduled maintenance procedures as prescribed in your MRC cards improper maintenance damage in shipment abnormal use removal alterati...

Page 4: ...on may be obtained by calling the Frymaster Service Department The following information will be needed in order to assist you quickly and efficiently Model Number _________________________ Serial Num...

Page 5: ...ogging the blower assembly Simply fit the part on to the vent opening of the computer cowl assembly The filter screen will snap into position If equipped with an optional holding screw tighten screw t...

Page 6: ...ine Page 4 1 800 24 FRYER 6 HLZ MODEL COMPONENT IDENTIFICATION Heated air flows from the air heater blower and heat rises from the heater plate Heater Plate Calibration Socket Air Heater Calibration S...

Page 7: ...default is set to the McDonald s standard of 220 F If the factory default temperature settings are acceptable skip to Section 7 2 Page 6 Ensure that the HLZ computer is in the OFF position nothing in...

Page 8: ...amming both heaters press the Check Switch again to store the programmed setpoints and exit the programming mode OR to change the setpoint temperature for the other heater press the corresponding Heat...

Page 9: ...light in the display when either the heater plate or air heater is energized When the HLZ is ready for operation the display reads REdY ready Place product in the HLZ in accordance with the restaurant...

Page 10: ...latching relay After 20 minutes of operation computer display shows PROB RTD probe has failed Isolate failed component by checking temperature of air and heater plate with the temperature display key...

Page 11: ...le 208 240V 22 x12 806 9239 Line Filter CE 807 2818 Plug Assembly Computer 806 9636 Air Relay SS Service 826 2038 Plate Relay SS Service 826 1958 Relay Latching 807 3021 Blower 230V CE 807 3691 Blower...

Page 12: ...l on the heater plate while troubleshooting 9 4 Replacing Solid State Relays a Avoid miswiring Examine the terminals carefully and take notes to avoid miswiring b Remove the plate holding the relay as...

Page 13: ...of the front air delivery 9 6 Replacing Air Thermocouple and Air RTD Probe a Follow procedures in section 9 3 to access the Air Delivery tower components b Cut old lead wires close to the faulty air...

Page 14: ...late and chassis f Remove acrylic tape from the heater plate and frame to prevent rebounding while servicing g When reinstalling the heater plate apply new acrylic tape to the HLZ chassis first Then p...

Page 15: ...r i Slip the hi limit wires into the removed grommets and snap back into place j Plug the black wire leading from pin 1 in the computer plug into the terminal of the hi limit k Plug the other hi limit...

Page 16: ...r delivery panel 4 Test fit the air delivery assembly to see if a gap is visible once the assembly is properly seated If a gap remains apply a second gasket to create a better seal 5 Make sure the bra...

Page 17: ...sure DC voltage points to a problem with the computer or connection With power supplied and computer turned on measure AC voltage across output terminals of relay With computer calling for heat dot il...

Page 18: ...isting on the resistance chart With the unit cool the resistance reading should approximate the resistance shown on the chart for the room temperature Also check for short to ground A chaffed wire sho...

Page 19: ...age is applied Symptom Overheats Test With power removed from the HLZ measure resistance between pin 4 white wire on the latching relay and terminal 4 on the air heater relay The reading should be bet...

Page 20: ...5 and 65 ohms Remove power from unit On 240V units disconnect red and white wires connecting blower to heat and latching relays The resistance between the wires should be between 62 and 72 ohms 10 10...

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