Bedienungsanleitung Mitsubishi HMA100VM (Seite 20 von 40) (Englisch)

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Dealing with comfort disruption

Operating mode “Add. heat only”

In the event of malfunctions that cause a low indoor temperature,

you can normally activate “Add. heat only” in indoor unit, which

means that heating only occurs with the immersion heater.

Activate the mode by holding in the operating mode button

for 7 seconds.

Note that this is only a temporary solution, as heating with the

immersion heater does not make any savings.

Emergency mode

Emergency mode is activated by setting the switch to “ ”.

It is used when the control system and thereby operating mode

“Add. heat only” do not function as they should. Emergency

mode is activated by setting switch (SF1) to “ ”.

The following applies in emergency mode:

■ The front panel is not lit and the control computer in

indoor unit is not connected.

■ Outdoor unit is off and only the circulation pump and

immersion heater in indoor unit are active.

■ An electrical step of 4 kW is connected. The immersion

heater is controlled by a separate thermostat (BT30).

■ The automatic heating control system is not operational, so

manual shunt operation is required. Call installer.

The phenomena mentioned below is not malfunction.

The air conditioning system

sounds as if water is

draining from it.

Sounds of rustling or gurgling may be heard when the operation is started, when the compressor is

activated/deactivated during operation, or when the operation is stopped. These are the sounds of the

refrigerant ﬂowing through the system.

Sounds of rustling or

gurgling may be heard from

a stopped indoor unit.

These sounds can be heard when the air conditioning system is performing automatic control.

The air conditioning system

cannot start operating again

immediately after stopping.

Outdoor unit does not restart during the ﬁrst 3 minutes after stopping operation. This is because a

circuit for protecting the compressor is activated (the fan is operating during this period).

The outdoor unit discharges

water or steam during

heating operation.

Water or steam is discharge during defrosting operation which removes frost built up on the surface of

the heat exchanger in the outdoor unit in heating mode.

The outdoor unit fan is not

running even when the

system is in operation.

The fan speed is automatically controlled according to the ambient temperature. It may be stopped in

high ambient temperature in case of heating, and in low ambient temperature in case of cooling. Also,

the fan is stopped during defrosting operation.

REQUESTS

The fan will suddenly begin to operate even if it is stopped. Do not insert ﬁnger and/or stick.

Hissing sounds are heard

when the operation is

stopped or during defrost

operation.

These sounds are generated when the refrigerant valve inside the air conditioning system is activated.

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Mitsubishi HMA100VM Seite 20

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