TROUBLESHOOTING
Vecto r H® S eries ▪ Operat or’s M anual ▪ M N-46 2 95 ▪ Rev 7 ▪ 6/22
95
TROUBLESHOOTING
Error Codes
Code Description Parameters that trigger the error Possible Cause(s)
E-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
E-10 Sensor short Short circuit detected on sensor wires. 1. Sensor connection
2. Sensor
3. Control board
E-11 Sensor open Cavity air sensor reading > 650°F (343°C). 1. Sensor connection
2. Sensor
3. Control board
E-30 Unit under
temperature
Cavity temperature remains 25°F (14°C)
below target for more than 90 minutes.
Troubleshoot heating element
E-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
E-87 Gas lockout Loss of flame three times within 5
minutes.
Lack of fuel pressure.
E-88 Ignition module/valve
failure
Two, 4-second tries for light at the
ignition module with a 30-second delay
between.
1. Valve status is not open after call for heat.
E-90 Gas combustion
blower speed failure
Blower RPM is outside +/- 10% of
expected RPMs at start of call for heat, or
post-ramping when the end speed is
reached.
1. Power supply cable is not connected to
blower motor.
2. Speed control cable is not connected to
blower motor.
3. Blower motor is blocked, rotation is
impeded, or motor is faulty.
4. Faulty PWM daughter board.
E-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
E-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
E-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
To Next Page
Loading...
Need help?
General
