Frymaster Heated Landing Zone HLZ 22 - Manual (Page 19)

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 17
1-800-24-FRYER
10.6 Plate Heater
Symptom: No heat when voltage is applied.
Symptom: Overheats
Tests:
• With power removed from the HLZ , measure resistance between terminal 4 (white wires)
on the latching relay and terminal 4 on the plate heater relay. The reading should be 215
to 230 ohms on an HLZ 18; 150-180 ohms on an HLZ 22. Also, check for continuity to the
chassis. Resistance seen there indicates a chaffed or shorted wire.
10.7 Air Heater
Symptom: No heat when voltage 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 between 18
and 26 ohms on a 208V unit and 25 and 33 ohms on a 240V unit. Also, check for
continuity to the chassis. Resistance seen there indicates a
chaffed or shorted wire.
10.8 Latching Relay
Symptom: Computer calls for heat (dot illuminated). No heat
from plate and blower doesn’t operate.
Test:
• With power removed from the HLZ and the wire removed
from pin 1 or 0 of the latching relay, measure resistance
between pins 1 and 0. It should be between 79 and 89 ohms.
10.9 Blower
Symptom: No airflow.
Symptom: Unit overheats; displays PROB.
Tests:
The latching relay is
positioned in the HLZ
with the 0 and 1
terminals facing the front
of the unit.