Test Run (Using Wireless Remote Controller); When Wireless Remote Controller Troubles Or Its Battery Is Exhausted; When Wired Remote Controller Or Indoor Unit Micro Computer Troubles - Mitsubishi PLH-3AAK Technical & Service Manual

8-5-3. Test run (Using wireless remote controller)

A
TEST RUN
ON/OFF TEMP
7
FAN AUTO STOP
MODE VANE AUTO START
3,4
CHECK LOUVER h
TEST RUN min
2
SET RESET CLOCK

8-5-4. When wireless remote controller troubles or its battery is exhausted

1. Emergency operation is available in such a case using emergency operation switch equipped next to the receiver of indoor
unit.
2. To start operation
• Cooling Operation·······Press
Heating Operation·······Press
•
wWhen the unit starts operating, the operation lamp is lit.
wEmergency operation will be performed as follows.
Mode
Set temperature
Fan speed
Airflow direction
3. To stop operation
• Press either emergency operation switch (cooling/heating).

8-5-5. When wired remote controller or indoor unit micro computer troubles

1.When the wired remote control or the indoor unit microcomputer has failed,but all other compornents work
if you set the switch (SWE, SW6) on the indoor control board, the indoor unit will begin properly
Emergency Operation.
WNote on the wireless remote control: when the remote control does not function, it is possible to
activate Emergency Operation by using the indoor unit emergency operation switch (SW1,SW2 of the
wireless signal receiver board).
However,if the indoor unit microcomputer has failed,it is nesessary to proceed with points 2 and
3 below as in the case of the wired remote controller.
2.When you activate emergency operation of the cooling or heating, you have to set the switch (SWE) and
switch (SW6) on the indoor controller.
SWE : ON • Indoor fan is running at high speed. • Drain-up machine is working.
SW6-1 : ON • Emergency operation of cooling mode.
SW6-1,2 : ON • Emergency operation of heating mode.
3.Before you activate emergency operation, check the following points:
(1) Emergency operation cannot be activated when:
• the outdoor unit malfunctions. • the indoor fan malfunctions.
• when it has detected the malfunction of drain-up machine during self-diagnosing.
(2) Emergency operation becomes continuous only by switching the power source on/off. ON/OFF on the
remote control or temperature control etc,dose not function.
(3) Avoid operating for a long time when the outdoor unit begins defrosting while emergency operation of
the heating is activated, because it will start to blow cold air.
(4) Emergency cooling should be limited to 10 hours maximum (The indoor unit heat exchanger may freeze).
(5) After emergency operation has been deactivated, set the switches etc.to their original positions.
(6) Movement of the vanes does not work in emergency operation, therefore you have to slowly set them
manually to the appropriate position.
1 Turn on the power to the unit at least 12 hours before the test run.
TEST RUN
2 Press the
(Start this operation from the status of remote controller display turned off.)
A
and current operation mode are displayed.
TEST RUN
MODE
3 Press the
cool air is blown out from the unit.
MODE
4 Press the
cool air is blown out from the unit.
FAN
5 Press the
5
VANE
6 Press the
6
7 Press the ON/OFF button to stop the test run.
Note:
• Point the remote controller towards the indoor unit receiver while following steps 2 to 6.
• It is not possible to run the in FAN or DRY mode.
(Cooling) switch.
(Heating) switch.
Cooling
24:
High
Horizontal (30deg)
button twice continuously.
button to activate
button to activate
button and check whether fan speed changes.
button and check whether the auto vane operates properly.
Emergency operation switch (cooling)
Emergency operation switch (heating)
Receiver
Operation lamp
Downward (70deg)
43
mode, then check whether
COOL
mode, then check whether
HEAT
Heating
24:
High