Page 49
TROUBLESHOOTING GUIDE
Error Code
Error
Possible Cause
Test/Action
E1
EEPROM read error.
Moisture on control
board.
1
Inspect for steam leaks.
2
Replace the control board if error persists.
E2
EEPROM writes error.
Moisture on control
board.
1
Inspect for steam leaks.
2
Replace the control board if error persists.
E3
EEPROM status error.
Moisture on control
board.
1
Inspect for steam leaks.
2
Replace the control board if error persists.
E4/F5
Control board MAIN-
DATA invalid.
Reload software error.
1
Turn the power to the unit off and then back on.
2
Replace the control board.
E5/F5
Control board MAIN-
DATA incompatible.
Reload process error.
1
Turn the power to the unit off and then back on.
2
Replace the control board.
E6/F5
Unit model
identification invalid.
1
Inspect the connector and jumper on relay board
X14-8 to X14-11 for loose or broken connection.
2
Turn the power to the unit off and then back on.
3
Replace the control board and relay board.
E7/F5
Relay board MAIN-
DATA invalid.
Reload software error.
1
Turn the power to the unit off and then back on.
2
Replace the relay board.
E8/F5
Relay board MAIN-
DATA incompatible.
Reload software error.
1
Turn the power to the unit off and then back on.
2
Replace the relay board.
E9/F0
Temperature sensor
short circuit.
Short circuit in the
temperature sensor or
control board.
1
Measure the resistance of the temperature sensor.
2
Replace the control board.
E10/F0
Temperature sensor
interruption.
Interruption in the
temperature sensor or
control board.
1
Measure the resistance of the temperature sensor.
2
Replace the control board.
E11/F0
Reference cavity
temperature short
circuit.
Replace the control board.
E12/F0
Interruption of the
reference cavity
temperature.
Replace the control board.
E13/F11
Cavity temperature
over temperature.
Temperature sensor,
relay error, or a
programming issue.
1
Verify the element relay is cycling.
2
Verify the temperature sensor resistance is
correct.
3
Verify the cavity temperature is exceeding the
maximum temperature.
4
Replace the control board and relay board.
E14/F8
Critical relay error.
Software or
mechanical issue.
1
If the firmware version is 06 or lower, load
firmware higher than K5.22800-07 for the relay
board.
2
The software download is faulty. Repeat the
download.
3
Turn the power to the unit off and then back on.
4
Replace the relay board and control board.
E Series SO24 (SWS 13543126)
Troubleshooting
TROUBLESHOOTING
service.subzero.com
827705 REVA 01/2019
48