Mitsubishi Heavy Industries HMU140KXZE1 User Manual Download

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Contact company

Back

Company

MHI

Phone No.

000-000-0000

INSPECTION DISPLAY, STANDBY, ROOM TEMPERATURE AND BACK UP DISPLAY

< WIRED REMOTE CONTROL (RC-EX3H) >

WHEN THE UNIT PROTECTION STOP IS INDICATED

If room temperature display setting is activated, room temperature is displayed on the remote control display.

CONTACT COMPANY & ERROR DISPLAY

ROOM TEMPERATURE DISPLAY

STANDBY WAIT A WHILE DISPLAY

BACK UP DISPLAY

The “Unit protection stop” is displayed on the message

display.

Tap the

button.

When the

Normal display

and

Error display

button is displayed, tap the

Error display

button.

Contents of error are displayed.

After checking the error contents (Code), tap the

Contact

button.

Or tap the

Normal display

button on the previous screen and select the “Contact company” on the menu

screen and tap it.

Company information (Name and phone No. of contact) is displayed.

This is displayed when it has been preset by your dealer.

If any error occurs on the hydro module unit, the “Unit protection stop” is indicated on the message display. Take the following measures,
stop the operation and consult your dealer.

Normal display

Error display

Back

Select the item.

The message “Standby. Wait a while.” may be displayed (maximum of 30 minutes) on the R/C during the first
operation following a breaker power on or power loss.
This does not indicate a failure; it is caused by the cooling machine oil protect control that is activated in order
to protect the compressor.
Please wait until the message “Standby. Wait a while.” disappears.

When any error occurs on the OU but its operation is continued as an emergency measure, the message of
“Back-up” will be displayed.
When the “Back-up” is displayed, contact dealer/company shown as the Contact company immediately for
checking.



If the operation is continued without checking, it could result in breakdown.

TROUBLE SHOOTING

Check the following items before requiring service.

If, after checking the items above, the hydro module unit still does not operate normally or in the next cases, stop operating and contact your dealer.

• If the fuse and breaker blow frequently. • If water drips at cooling/dehumidifying operation.

• If the operation or operation noise is abnormal.

• If the "unit protection stop" is indicated.

The phenomena mentioned below is not malfunction.

The hydro module unit 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 hydro module unit system is performing automatic control.

The indoor pump does not stop
even when the operation is
stopped in heating mode.

The indoor unit pump may continue operating for 5 minutes in order to remove remaining heat in the
indoor unit.

CAUTION

Do not turn off the power supply until the pump stops.

The hydro module unit system
cannot start operating again
immediately after stopping.

During the first 3 minutes after stopping operation, it is not possible to perform cooling or heating
operation even if the ON/OFF button is pressed to indicate “operation.” This is because a circuit for
protecting the compressor is activated (the pump is operating during this period).

The outdoor unit discharges
water or steam during heating
operation.

Water or steam is discharged 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.

CAUTION

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

Slapping sounds are heard.

These sounds are generated when plastic components are expanded or shrunk by the heat and
rubbed with each other.

Hissing sounds are heard when
the operation is stopped or
during defrost operation.

These sounds are generated when the refrigerant valve inside the hydro module unit is activated.

The hydro module unit starts
operation automatically as soon
as the power supply is turned
on.

In case the automatic restart function is enabled, and when the power supply recovers, the system
restarts the operation automatically as same condition as before power supply is cut.



See page 13

The setting temperature cannot
be changed.

If changing the set temperature is prohibited on the remote control, it is not possible to change the
temperature setting even

▼

▲

is pressed.



See page 7

Even if the wired remote control
is operated, “central control”
light only flashes and doesn’t
operate.

Is not “central controlling” or “center” displayed?
If controlled with a separately purchased center console etc., the unit cannot be operated by the
remote control.

Is the power supply switch
turned off?

Is there a blackout or is
the fuse blown?

Is the leakage breaker
activated?

•

Is the direct daylight
coming into the room?

•

Are there any
unexpected heat
sources in the room?

•

Are there too many
people in the room?

OFF

Dangerous. Immediately
turn off the power supply
switch, and contact your
dealer.

THE UNIT DOES NOT WORK AT ALL