36 TROUBLESHOOTING
  Fault Code and Description
 When Active   Refer to...
 Warmup  Idle  Cooking  Test Mode
  F1: Blower Running Status Bad
a a a a
Page 37
  F2: Cook Temperature Low
a
Page 38
  F3: Magnetron Current Low
a a
Page 39
  F4: Door Monitor Defective
a a
Page 40
  F5: Magnetron Over Temperature
a a
Page 40
  F6:  EC Temperature High
a a a a
Page 41
  F7: RTD Open
a a a a
Page 41
  F8: Heat Low
a a
Page 42
  F9: Cook Cavity Temperature High
a a
Page 42
Fault codes are listed in order of hierarchy. For example, if during cooking the oven experiences an F1 
and F2 fault, the oven will report only the F1 fault because the software will halt all actions upon 
discovering the F1 fault.
FAULT CODES F1  F5 AND F7 WILL TERMINATE A COOK CYCLE UPON DISCOVERY.
F7: RTD Open
This fault is displayed when the control detects that
one or both of the RTDs is “open.” The display will 
show “999
º
” indicating the RTD is open or 
disconnected. The fault is cleared when the control 
detects continuity.
F8: Heat Low
This fault displays when the oven is warming up 
or during Test Mode (page 19) if the cook cavity 
temperature fails to rise at least 14
º
F (7
º
C) within a 
given 30 seconds.
F9: Cook Cavity Temperature High
This fault will signal that the catalyst has “flashed” 
due to excessive grease. The fault occurs when the 
RTD senses +650°F (343°C) for more than 40 
seconds but less than 2 minutes. The fault will only 
appear in the fault log and will not terminate a cook 
cycle upon discovery.