Mitsubishi Electric QAHV Série Manuel D'installation & D'instructions page 7

To maintain optimum performance and reduce the risk of
malfunction, keep the air pathway clear.
To ensure proper operation of the unit, periodically
check for proper concentration of anti-freeze.
Inadequate concentration of anti-freeze may compromise the
performance of the unit or cause the unit to abnormally stop.
Take appropriate measures against electrical noise
interference when installing the units in hospitals or
facilities with radio communication capabilities.
Inverter, high-frequency medical, or wireless communication
equipment as well as power generators may cause the units
to malfunction. The units may also adversely affect the
operation of these types of equipment by creating electrical
noise.
Check the water system, using a relevant manual as a
reference.
Using the system that does not meet the standards (including
water quality and water flow rate) may cause the water pipes
to corrode.
To reduce the risk of power capacity shortage, always use a
dedicated power supply circuit.
This appliance is intended to be used by expert or trained
users in shops, in light industry and on farms, or for
commercial use by lay persons.
This appliance incorporates an earth connection for
functional purposes only.
GB-7