12 Error codes
The error codes shown in the table below will be visible in the INDOOR UNIT display whenever an error is detected from the OUTDOOR
UNIT. ALL errors will stop the compressor from running until the error is solved. Some errors are automatically cleared, some needs man-
ual action and some severe errors might even need hardware to be replaced or serviced. Follow the superscript to below the table for
further information.
It takes a minimum of 3 minutes for the compressor to start from a
standstill.
Display Explanation Error source
E101
1
Communication error between the indoor and outdoor unit (when indoor unit cannot receive
signals)
COMM KIT
OUTDOOR UNIT
E108 Setting Address Duplicate Error OUTDOOR UNIT
CONTROL KIT
E109
1
Communication error due to indoor unit address incomplete COMM KIT
OUTDOOR UNIT
E111
1
Modbus communication error (when COMM KIT cannot receive signals) COMM KIT
OUTDOOR UNIT
E162
3
EEPROM H/W error COMM KIT
E163 EEPROM OPTION SETTING Error OUTDOOR UNIT
E177
1
Emergency error COMM KIT
OUTDOOR UNIT
E201
1
COMM KIT/OUTDOOR UNIT communication error (matching error) OUTDOOR UNIT
E202
1
COMM KIT/OUTDOOR UNIT communication error (3 min) OUTDOOR UNIT
E203
1
Communication error between INVERTER and MAIN MICOM (6 min) OUTDOOR UNIT
E205 Communication Error Between Outdoor Unit Inv Micom - Fan Motor Micom OUTDOOR UNIT
E221
1
OUTDOOR UNIT temperature sensor error OUTDOOR UNIT
E231
1
Condenser temperature sensor error OUTDOOR UNIT
E241 COND OUT Sensor of Outdoor Unit breakaway Error OUTDOOR UNIT
E251
1
Discharge temperature sensor error OUTDOOR UNIT
E262 Discharge Sensor breakaway Error OUTDOOR UNIT
E266 Comp Top Sensor breakaway Error OUTDOOR UNIT
E269 SUCTION Sensor breakaway Error OUTDOOR UNIT
E276 Compressor Top Temperature Sensor Error (open/short) OUTDOOR UNIT
E291 High Pressure Sensor Error (open/short) OUTDOOR UNIT
E296 Low Pressure Sensor Error (open/short) OUTDOOR UNIT
E308 Suction Sensor Error (open/short) OUTDOOR UNIT
E320
1
OLP sensor error OUTDOOR UNIT
E321 EVI Inlet Sensor Error (open/short) OUTDOOR UNIT
E322 EVI Outlet Sensor Error (open/short) OUTDOOR UNIT
E403
1, 4
Detection of OUTDOOR UNIT compressor freezing (during cooling operation) OUTDOOR UNIT
E404
1, 4
Protection of OUTDOOR UNIT when it is overload (during Safety start, Normal operation state) OUTDOOR UNIT
E407
1, 4
Comp down due to high pressure OUTDOOR UNIT
E410 COMP down due to Low PressureSensor Protection Control OUTDOOR UNIT
E416
2
Discharge of compressor is overheated OUTDOOR UNIT
E425
2
Power source line missing error (only for 3-phase models) OUTDOOR UNIT
E428 COMP down by Compression Ratio control Error OUTDOOR UNIT
Commissioning iTec XT
AWIXT01CG0102 Thermia AB
56
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