Maintenance Mode Operating Method - Mitsubishi Electric PAR-21MAA Technical Manual

$ . Easy Maintenance Function (For Mr.SLIM PUHZ series)
●Reduces maintenance work drastically.
●Enables you to check operation data of the indoor and outdoor units by remote controller.
Furthermore, use of maintenance stable-operation control that fixes the operating frequency, allows smooth inspection, even for
inverter models.
Smooth Mainte-
nance Function
Easy maintenance information (unit)
Compressor Outdoor unit
Accumulated operating Heat exchanger
time (×10 hours) temperature (°C)
Number of ON/OFF Discharge
times (×10 times) temperature (°C)
Operating Outside air
current (A) temperature (°C)
* The filter operating time is the time that has elapsed since the filter was reset.

1. Maintenance Mode Operating Method

* If you are going to use the " 2. Guide for Operation Condition ", set the airflow to "High" before activating maintenance mode.
● Switching to maintenance mode
Maintenance mode can be activated either when the air conditioner is operated or stopped.
It cannot be activated during test run.
Maintenance information can be viewed even if the air conditioner is stopped.
Operation mode
Compressor
information
TEST
(1) Press the
[Display ]
MAINTENANCE
If stable operation is unnecessary or if you want to check the data with the air conditioner stopped, skip to step (4).
● Fixed Hz operation
The operating frequency can be fixed to stabilize operation of inverter model.
If the air conditioner is currently stopped, start it by this operation.
MODE
(2) Press the
Stable cooling
[Display ]
operation
COOL
STABLE MODE
(3) Press the
FILTER
[Display ] Waiting for stabilization
6
Discharge temperature 64 °C
Indoor unit
Room
temperature (°C)
Heat exchanger
temperature (°C)
Filter operating
time* (Hours)
■ Remote controller button information
Indoor unit information
button for 3 seconds to switch to maintenance mode.
button to select the desired operation mode.
Stable heating
operation
HEAT
STABLE MODE
( ) button to confirm the setting.
●
Conventional inspection work
lOutdoor unit l ?
Remove the
service panel.
Measure the discharge
temperature.
Stable operation
cancellation
STABLE MODE
CANCEL
lIndoor unit l
Measure
the intake air
temperature.
Measure the outside air
temperature
Outdoor unit information
Confirm
Active / cancel
maintenance mode
Stabilized
After 10 to 20 minutes