Hitachi Freezers Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
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d1
Freezer shows d1 and the defrost cycle does not complete properly.
Defrost Timer / Defrost Control Error
d2
Freezer displays d2 and may remain in defrost too long or not enter defrost.
Defrost Duration / Termination Error
E1
Freezer shows E1 and the interior temperature reading is clearly incorrect.
Display Temperature Sensor Calibration Error
E2
Freezer displays E2 and the alarm beeps intermittently.
Door Open Alarm / Door Sensor Error
E3
Freezer shows E3 and may not enter quick-freeze or power-freeze mode.
Quick-Freeze Function Control Error
E4
Freezer displays E4 and the interior light or alarm behaves erratically.
Low Voltage / Power Supply Error
F0
Freezer display shows F0, and the unit may not start or may run erratically.
Main Control PCB Communication Error
F1
Freezer shows F1, and it may not cool properly or may run continuously.
Freezer Compartment Thermistor (Sensor) Fault
F2
Display shows F2, and the freezer temperature is unstable or not cold enough.
Ambient / Room Temperature Sensor Fault
F3
Freezer shows F3, and it may over-freeze or fail to maintain the set temperature.
Defrost Sensor / Evaporator Thermistor Fault
F4
Freezer displays F4, and it may not defrost properly, leading to ice buildup on the evaporator.
Defrost Heater Circuit Fault
F5
Freezer displays F5 and may not cool or may cycle erratically.
Compressor Discharge Temperature Sensor Fault
F6
Freezer displays F6 and may shut down or run in a protective mode.
Condenser Temperature Sensor Fault
F7
Freezer displays F7 and the compressor does not start or stops shortly after starting.
Compressor Start/Overload Protection Fault
F8
Freezer displays F8 and the interior fan does not run or runs intermittently.
Evaporator Fan Motor Fault
F9
Freezer displays F9 and the condenser fan at the rear does not run.
Condenser Fan Motor Fault
FA
Freezer displays FA and may not respond to key presses or settings.
Keypad / Touch Control Panel Fault
Fb
Freezer displays Fb and the interior light or door switch functions abnormally.
Door Switch / Door Sensor Fault
H1
Freezer displays H1 and the interior temperature is too high (warm freezer).
High Temperature Alarm Condition
H2
Freezer displays H2 and may run continuously with a very low internal temperature.
Low Temperature / Overcooling Alarm
H3
Freezer displays H3 and the compressor stops frequently or does not start.
Compressor Overheat / Overcurrent Protection
H4
Freezer shows H4 and may stop cooling or enter a protective shutdown.
Inverter / Compressor Drive Fault (for inverter-type Hitachi freezers)
H5
Freezer displays H5 and may not respond to temperature changes or mode selections.
EEPROM / Memory Error in Main Control PCB
Symptom
Condensation or moisture forming on the exterior cabinet or around the door gasket.
Exterior Condensation
Symptom
Control panel buttons unresponsive, but the display is lit.
Keypad Input Failure
Symptom
Display flickering or segments missing, but the freezer cools normally.
Display Module Failure
Symptom
Freezer alarm beeping intermittently with no visible error code.
Unspecified Alarm – Temperature or Door
Symptom
Freezer door difficult to open immediately after closing.
Door Vacuum / Pressure Lock
Symptom
Freezer has a bad odor or chemical smell inside.
Odor Contamination
Symptom
Freezer interior light not working, but cooling is normal.
Interior Lamp Circuit Failure
Symptom
Freezer interior temperature fluctuates widely, causing soft and hard spots.
Inconsistent Temperature Control
Symptom
Freezer making a loud humming or buzzing noise from the rear.
Compressor or Condenser Fan Noise
Symptom
Freezer making a loud rattling or knocking noise from inside the cabinet.
Evaporator Fan or Loose Components
Symptom
Freezer not cooling at all; the interior is warm and the compressor is not running.
No Cooling – Compressor Not Running
Symptom
Freezer runs but does not reach the set temperature (insufficient cooling).
Poor Cooling – Long Run Time
Symptom
Freezer starts, then stops after a few seconds, repeating the cycle.
Short Cycling – Compressor Protection
Symptom
Freezer vibrating excessively or making a droning noise that resonates through the floor.
Excessive Vibration / Poor Leveling
Symptom
Freezer will not start at all; no lights or display.
No Power / Dead Freezer
Symptom
Frost buildup on food packages and along interior walls.
Excessive Frost Formation
Symptom
Ice buildup on the freezer floor or under lower baskets.
Internal Ice Leak from Blocked Defrost Drain
Symptom
The freezer is over-freezing; food is excessively hard, and ice forms on packaging.
Overcooling – Thermostat or Sensor Miscontrol
Symptom
Water leaking onto the floor from under or around the freezer.
External Water Leak
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| d1 |
Freezer shows d1 and the defrost cycle does not complete properly.
|
Defrost Timer / Defrost Control Error | View Details |
| d2 |
Freezer displays d2 and may remain in defrost too long or not enter defrost.
|
Defrost Duration / Termination Error | View Details |
| E1 |
Freezer shows E1 and the interior temperature reading is clearly incorrect.
|
Display Temperature Sensor Calibration Error | View Details |
| E2 |
Freezer displays E2 and the alarm beeps intermittently.
|
Door Open Alarm / Door Sensor Error | View Details |
| E3 |
Freezer shows E3 and may not enter quick-freeze or power-freeze mode.
|
Quick-Freeze Function Control Error | View Details |
| E4 |
Freezer displays E4 and the interior light or alarm behaves erratically.
|
Low Voltage / Power Supply Error | View Details |
| F0 |
Freezer display shows F0, and the unit may not start or may run erratically.
|
Main Control PCB Communication Error | View Details |
| F1 |
Freezer shows F1, and it may not cool properly or may run continuously.
|
Freezer Compartment Thermistor (Sensor) Fault | View Details |
| F2 |
Display shows F2, and the freezer temperature is unstable or not cold enough.
|
Ambient / Room Temperature Sensor Fault | View Details |
| F3 |
Freezer shows F3, and it may over-freeze or fail to maintain the set temperature.
|
Defrost Sensor / Evaporator Thermistor Fault | View Details |
| F4 |
Freezer displays F4, and it may not defrost properly, leading to ice buildup on the evaporator.
|
Defrost Heater Circuit Fault | View Details |
| F5 |
Freezer displays F5 and may not cool or may cycle erratically.
|
Compressor Discharge Temperature Sensor Fault | View Details |
| F6 |
Freezer displays F6 and may shut down or run in a protective mode.
|
Condenser Temperature Sensor Fault | View Details |
| F7 |
Freezer displays F7 and the compressor does not start or stops shortly after starting.
|
Compressor Start/Overload Protection Fault | View Details |
| F8 |
Freezer displays F8 and the interior fan does not run or runs intermittently.
|
Evaporator Fan Motor Fault | View Details |
| F9 |
Freezer displays F9 and the condenser fan at the rear does not run.
|
Condenser Fan Motor Fault | View Details |
| FA |
Freezer displays FA and may not respond to key presses or settings.
|
Keypad / Touch Control Panel Fault | View Details |
| Fb |
Freezer displays Fb and the interior light or door switch functions abnormally.
|
Door Switch / Door Sensor Fault | View Details |
| H1 |
Freezer displays H1 and the interior temperature is too high (warm freezer).
|
High Temperature Alarm Condition | View Details |
| H2 |
Freezer displays H2 and may run continuously with a very low internal temperature.
|
Low Temperature / Overcooling Alarm | View Details |
| H3 |
Freezer displays H3 and the compressor stops frequently or does not start.
|
Compressor Overheat / Overcurrent Protection | View Details |
| H4 |
Freezer shows H4 and may stop cooling or enter a protective shutdown.
|
Inverter / Compressor Drive Fault (for inverter-type Hitachi freezers) | View Details |
| H5 |
Freezer displays H5 and may not respond to temperature changes or mode selections.
|
EEPROM / Memory Error in Main Control PCB | View Details |
| – |
Condensation or moisture forming on the exterior cabinet or around the door gasket.
|
Exterior Condensation | View Details |
| – |
Control panel buttons unresponsive, but the display is lit.
|
Keypad Input Failure | View Details |
| – |
Display flickering or segments missing, but the freezer cools normally.
|
Display Module Failure | View Details |
| – |
Freezer alarm beeping intermittently with no visible error code.
|
Unspecified Alarm – Temperature or Door | View Details |
| – |
Freezer door difficult to open immediately after closing.
|
Door Vacuum / Pressure Lock | View Details |
| – |
Freezer has a bad odor or chemical smell inside.
|
Odor Contamination | View Details |
| – |
Freezer interior light not working, but cooling is normal.
|
Interior Lamp Circuit Failure | View Details |
| – |
Freezer interior temperature fluctuates widely, causing soft and hard spots.
|
Inconsistent Temperature Control | View Details |
| – |
Freezer making a loud humming or buzzing noise from the rear.
|
Compressor or Condenser Fan Noise | View Details |
| – |
Freezer making a loud rattling or knocking noise from inside the cabinet.
|
Evaporator Fan or Loose Components | View Details |
| – |
Freezer not cooling at all; the interior is warm and the compressor is not running.
|
No Cooling – Compressor Not Running | View Details |
| – |
Freezer runs but does not reach the set temperature (insufficient cooling).
|
Poor Cooling – Long Run Time | View Details |
| – |
Freezer starts, then stops after a few seconds, repeating the cycle.
|
Short Cycling – Compressor Protection | View Details |
| – |
Freezer vibrating excessively or making a droning noise that resonates through the floor.
|
Excessive Vibration / Poor Leveling | View Details |
| – |
Freezer will not start at all; no lights or display.
|
No Power / Dead Freezer | View Details |
| – |
Frost buildup on food packages and along interior walls.
|
Excessive Frost Formation | View Details |
| – |
Ice buildup on the freezer floor or under lower baskets.
|
Internal Ice Leak from Blocked Defrost Drain | View Details |
| – |
The freezer is over-freezing; food is excessively hard, and ice forms on packaging.
|
Overcooling – Thermostat or Sensor Miscontrol | View Details |
| – |
Water leaking onto the floor from under or around the freezer.
|
External Water Leak | View Details |
No matching codes found
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