Troubleshooting; Work At Height - DeDietrich UME 20 Installation And Service Manual

Do not have the air conditioning system repaired by an unqualified person, as there are risks associated with the
electrics and R32 refrigerant. Always contact a professional
The fault code appears on the panel of the indoor unit in place of the temperature
Error code
E1 Room temperature sensor fault
E2 Fault on the refrigerant sensor in the OU
E3 Fault on the refrigerant sensor in the IU
E4 IU fan fault (motor PG)
E5 (5E) Communication error between IU and OU
F0 OU fan fault (motor DC)
F1 Inverter PCB fault (IPM)
F2 OU protection PCB fault (PFC)
F3 Compressor fault
F4 Discharge sensor fault
F5 Compressor overcurrent fault
F6 Outside air sensor fault
F7 High or low voltage fault
F8 Communication fault
F9 OU EEPROM fault
FA Inlet sensor fault
P4 Electrical overload in cooling mode
P5 Electrical overload in heating mode
P6 IU overheating protection in heating mode
P7 IU frost protection in cooling mode
P8 OU overcurrent protection

To avoid the risks of working at height, follow the procedure below in the order indicated:
- Wherever possible, organise work, processes and equipment so as to avoid working at height (e.g. levelling
mechanism, telescopic equipment, etc.)
- If the risk remains, note that the law requires temporary work at height to be carried out from an operating
surface designed to prevent falls from height.
- Where work cannot be carried out from an operating surface, equipment will be selected so as to guarantee
safe working conditions.
- The means of access is the responsibility of the installer or the maintenance company, which should
take all necessary measures to enable technicians to work safely and in accordance with the labour
code.
20180803 CR v3

Troubleshooting

Problem

Work at height

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