McQuay MQS-24018-CFC216A Installation And Operation Manual page 31

5.4.15.3 Selection of Centigrade and Fahrenheit
Under off-state of the unit, press Mode and
Centigrade and Fahrenheit.
5.5 Error Display
If there is malfunction during running of the system, LCD will display error code at temperature–displayed location.
Once there is more than one malfunction , error codes will be displayed circularly. If there are multiple circuit
systems, the system number of failed system will be displayed before the colon (not for single system).
If malfunction occurs, turn off the unit and contact nearest dealer for help.
As shown in Fig.5-18, it means high pressure protection of system 2 under unit on.
Error code meaning:
Error code
E2 Indoor anti-freezing protection
E6 Communication malfunction
E9
Water overflow protection
Indoor unit ambient sensor malfunction at air return opening
F0
Evaporator sensor malfunction
F1
F5 Ambient sensor malfunction on Displayer (or LED board)
at the same time for 5s, the displayer panel will switch between
Fig.5-18
Malfunction
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