Operator Troubleshooting - Frymaster Heated Landing Zone HLZ Operator's Manual

CHAPTER 6: OPERATOR TROUBLESHOOTING
Symptom
No computer display; no flow from
air tower
No flow from air tower
After 20 minutes of operation
computer display shows PROB
After 20 minutes of operation
computer display shows HI
After 20 minutes of operation
computer display shows LO
HEATED LANDING ZONE
• No power
• Circuit breaker out
• Low voltage
• Bad fuse
• Bad transformer
• Hi-limit out
• Bad latching relay
• RTD probe has failed. Isolate failed component
by checking temperature of air and heater plate
with the temperature display keys on the
computer. The plate temperature should be
within ± 15°F of setpoint. The air heat should be
within ± 25°F of setpoint. If both temperatures are
good, the computer is likely bad.
• Plate heater, plate heater relay or RTD are faulty.
• Air heater, air heater relay or RTD are faulty
8
Possible Cause