TROUBLESHOOTING
Ve ct or F ® Se ries ▪ S ervice Man ual ▪ MN -4 6 895 ▪ R ev 1 ▪ 7/ 20
71
TROUBLESHOOTING
Error Codes
Code Description Parameters that trigger the error Possible Cause(s)
3
Motor error No cavity motor rotation detected for
greater than 30 seconds.
1. Connection between Variable Frequency
Drive (VFD) and control board
2. Connection between fan motor and VFD
3. Fan motor
4. VFD
5. Control board
10 Sensor short Short circuit detected on sensor wires. 1. Sensor connection
2. Sensor
3. Control board
11 Sensor open Cavity air sensor reading > 650°F (343°C). 1. Sensor connection
2. Sensor
3. Control board
31 Electronics over
temperature
Control board temperature exceeds
158°F (70°C) and/or interface board
temperature exceeds 184°F (84°C).
1. Cooling fan filters blocked or dirty
2. Cooling fan not operating
3. Installation clearance requirements not
met
94 Interface Board -
Control Board
communication error
No signal transfer for more than 5
seconds between the interface board
and the control board.
1. Connection of modbus cable
2. Modbus cable
3. Control board
4. Interface board
108 Bi-metal thermostat
open
Open circuit detected across bi-metal
switch.
1. Cooling fan filters blocked or dirty
2. Cooling fan not operating
3. Connection between bi-metal switch and
control board
4. Installation clearance requirements not
met
5. Bi-metal switch
109 High limit error
Note: Contact an
authorized
Alto-Shaam service
partner.
Open circuit detected across high limit
switch.
1. Jet plate(s) improperly installed
2. Cavity fan not operating
3. Optional grease filters blocked with debris
4. Heat relay(s) stuck closed
5. Connection between high limit switch and
control board
6. High limit switch
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