LAE Controller Error Codes

Troubleshooting & Configuration Tips from Be Cool Refrigeration

If you’re running a commercial freezer, cold room, or chiller that uses an LAE temperature controller, knowing how to read and interpret the display codes can save you time, money, and product loss.

This guide outlines common LAE controller error codes, what they mean, and how to access and adjust basic configuration settings — based on our 20+ years of on-site experience helping businesses keep their refrigeration systems running smoothly.

LAE Controller Error Codes – What They Mean

Use this table to identify issues when the controller displays an unexpected message:

Code	Description	What It Means / Action Needed
dEF	Defrost in progress	Normal cycle — unit is defrosting. No action required.
rEc	Recovery after defrost	System stabilising after defrost. Allow it to finish.
oFF	Controller in Stand-by	Unit is turned off or in manual standby. Press ON or check settings.
cL	Condenser clean warning	Scheduled maintenance alert — clean the condenser coils.
do	Door open alarm	Door has been left open — close to reset.
hc	Condenser high temperature alarm	Poor airflow or blocked fan — inspect and allow unit to cool.
hP	Condenser high pressure alarm	System pressure is too high — call technician.
hi	Room high temperature alarm	Temperature has exceeded setpoint range. Investigate cooling issue.
Lo	Room low temperature alarm	Temperature too low — check setpoints or probe placement.
E1	Probe T1 failure (main room sensor)	Replace or reconnect probe.
E2	Probe T2 failure (evaporator sensor)	Often related to defrost cycle — check probe.
E3	Probe T3 failure (aux/condenser sensor)	May affect condenser or second evaporator — inspect and replace.

How to Enter LAE Configuration Mode

To adjust your settings:

1. Press SET + UP together for 5 seconds.
2. Use UP / DOWN to scroll through the parameters.
3. Press SET to view a parameter’s value.
4. Hold SET and press UP / DOWN to adjust.
5. Release SET to save and move to the next parameter.
6. Exit by pressing nothing for 30 seconds or pressing SET again

Press SET + UP together for 5 seconds.

Use UP / DOWN to scroll through the parameters.

Press SET to view a parameter’s value.

Hold SET and press UP / DOWN to adjust.

Release SET to save and move to the next parameter.

Exit by pressing nothing for 30 seconds or pressing SET again

Essential Configuration Parameters Explained

Here are some key setup options with plain-English explanations to help you get the best performance:

Parameter	What It Does
SPL / SPH	Sets the min/max allowed temperature range. Useful for preventing accidental overcooling/heating.
SP	Main setpoint — the temperature you want maintained in the room.
HYS	Temperature differential — helps prevent short cycling.
C-H	Mode selector: use REF for cooling, HEA for heating.
DFT	Time between automatic defrosts (in hours). Set based on your frost load.
DTY	Defrost type: ELE = electric, GAS = hot gas, OFF = off cycle.
FID	Enables or disables fan operation during defrost.
DLI / DRT	Sets when defrost should end (based on temperature).
ATO / AHM	Controls alarm thresholds and how the unit behaves during overheat/high pressure conditions.
OS1–OS3	Sensor offsets — helpful if your temperature readings are slightly off.
ATM	Alarm threshold method: ABS for absolute values or REL for relative to setpoint.
ACC	Sets how often the unit reminds you to clean the condenser.
CRT	Compressor rest time between cycles — useful for extending equipment life.

Pro Tip: Defrost & Fan Setup for Best Results

1. If DFM = NON, no defrost will ever run — even manually.
2. If C-H = HEA, the unit is in heating mode, and defrost won’t trigger.
3. If DFT = 0, automatic defrost is disabled.
4. During high pressure alarm, defrost is paused.
5. During defrost, high temperature alarms are ignored — this is normal.

If DFM = NON, no defrost will ever run — even manually.

If C-H = HEA, the unit is in heating mode, and defrost won’t trigger.

If DFT = 0, automatic defrost is disabled.

During high pressure alarm, defrost is paused.

During defrost, high temperature alarms are ignored — this is normal.

Want Your System Running at Its Best?

Whether you need help interpreting a code, adjusting setpoints, or planning a full cold room setup we’re here to help. At Be Cool Refrigeration, we’ve supported businesses since 2004 with reliable commercial refrigeration services across the UK.

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