Below is a table about AC Rittal error code which is accompanied by how to resolve the problem. This error code table can be used as a guide for products with this series
| RITTAL AIR CONDITIONER PRODUCT SERIALS |
| SK 3302.xxx |
| SK 3302.3xx |
| SK 3303.xxx |
| SK 3304.xxx |
| SK 3305.xxx |
| SK 3328.xxx |
| SK 3329.xxx |
| SK 3332.xxx |
| SK 3361.xxx |
| SK 3366.xxx |
| SK 3377.xxx |
Rittal Air Conditioner Error Code Table
| Error Code In Display | Description | Possible cause | How to Fix it |
| A01 | Enclosure door open | The Door open or door limit switch incorrectly positioned | Close door, position door limit switch correctly, check connection if necessary |
| A02 | AC Internal temperature of enclosure too high | The Cooling capacity inadequate/unit undersized. Error as a consequence of messages A03 to A17. | Check cooling capacity |
| A03 | About Filter monitoring | The Filter mat soiled | Clean or replace; |
| reset the Comfort controller | |||
| A04 | Ambient temperature too high/too low | The Ambient temperature outside of admissible operating range (+10°C to +60°C) | Raise or lower the ambient temperature |
| (e.g. heat or ventilate the room) | |||
| A05 | Icing hazard | The Operational display in case of icing hazard. Evaporator coil fan may be mechanically blocked, defective, or cold air outlet obstructed. | Set the enclosure interior temperature to |
| a higher value. Check the evaporator fan; | |||
| release or exchange if necessary. | |||
| A06 | PSAH pressure-operated switch | The Ambient temperature too high | Lower the ambient temperature; |
| reset the Comfort controller | |||
| The Condenser soiled | Clean the condenser; | ||
| reset the Comfort controller | |||
| The Filter mat soiled | Clean or replace; | ||
| reset the Comfort controller | |||
| The Condenser fan defective | Replace; | ||
| reset the Comfort controller | |||
| The E-valve defective | Have the sensor repaired by a refrigeration engineer; reset the Comfort controller | ||
| The PSAH pressure-operated switch defective | Have the switch replaced by a refrigeration engineer; reset the Comfort controller | ||
| A07 | Evaporator coil | The Lack of coolant; sensor in front of or behind condenser defective. | Have the sensor repaired by a refrigeration engineer; reset the Comfort controller |
| A08 | Condensate warning | The Condensate discharge kinked or blocked | Check condensate discharge; repair any kinks or blockages in the hose as necessary |
| The Only in units with optional condensate evaporation | Check the evaporation unit, exchange if necessary | ||
| A09 | Condenser fan | Maybe Blocked or defective | Clear the blockage; replace if necessary |
| A10 | Evaporator fan | Maybe Blocked or defective | Clear the blockage; replace if necessary |
| A11 | Compressor | Compressor overloaded | No action required; |
| (internal winding protection) | unit switches back on automatically. | ||
| Defective | Exchange by refrigeration engineer | ||
| (check by measuring the winding resistance) | |||
| A12 | Condenser temperature sensor | Open or short-circuit | Replace |
| A13 | Ambient temperature sensor | Open or short-circuit | Replace |
| A14 | Icing temperature sensor | Open or short-circuit | Replace |
| A15 | Condensate warning temperature sensor | Open or short-circuit | Replace |
| A16 | Internal temperature sensor | Open or short-circuit | Replace |
| A17 | Phase monitoring | For three-phase devices only: Incorrect rotary field/phase absent | Exchange two phases |
| A18 | EPROM error | New board obstructed | Software update needed (only following board installation with more recent software): |
| Enter the programming level with Code 22; press button 1 and confirm with “Set” until “Acc” appears. Next, disconnect the unit from the mains and reconnect. | |||
| A19 | LAN/Master-Slave | Master and slave not connected | Check setting and/or cable |
| A20 | Voltage drop | Error display not shown | Event is stored in the log file |
| OL | Overload | Ambient parameters or heat loss outside of the applicable limits | |
| rSt | Reset | Manual device reset required, | |
| see “6.2.9 Resetting the Comfort controller”, page 32. | |||
| LH | Low heat | Minimal heat loss inside the enclosure | |
| E0 | Display message | Connection problem between the display and the controller board | Reset: Switch power supply off, then switch on again after approx. 2 sec. |
| Cable defective; connection loose | Exchange the boards | ||
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Tags: #rittal ac unit #rittal air conditioner #rittal aircon error code #rittal panel cooler fault codes
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