Display Panels; Types Of Display Panel; Output Under Normal Operating Conditions - Midea MDV-D22Q1/N1-D Technical Manual

1 Display Panels

1.1 Types of Display Panel

Two types of display panel are used on VRF indoor units: digital display panels (the new style display panels) and
the four LED display panels (the old style display panels). Examples of the two styles are shown in Figures 3.1 and
3.2.

1.2 Output Under Normal Operating Conditions

Table 3.1: Display panel output under normal operating conditions
Unit state
Standby
Auto-restart delay
Shutting-down
Normal operation
Operating
Cold draft prevention
outdoor unit defrosting
operation
A timer has been set
Notes:
1. Flashing slowly means flashing once per second.
2. Refer to 2.4.2 "Auto-restart
3. Unless a timer has been set, in which case the TIMER light/LED will be on.
4. In heating mode, cold draft prevention ensures that the indoor unit fan only runs when the indoor heat exchanger mid-point temperature is above a
certain temperature. Refer to Tables 2.1 to 2.6 in
5. In heating mode, outdoor units perform the defrosting operation in order to recover heating capacity. Refer to the outdoor unit technical
documentation.
6. The statuses of the other lights/LEDs are determined by whether the unit is currently in standby, auto-restart delay, shutting-down or operating.
Figure 3.1: Example of digital display panel (new style display
panel)
Figure 3.2: Example of four LED display panel (old style display
panel)
Lights
OPERATION light flashes
2 slowly
All lights off
OPERATION light on
4 or
OPERATION and
DEF./FAN lights on
5
TIMER light on
setting".
2.1 "PCB Switch and Jumper
Display output
Digital display panels
Digital display
3
Cooling and heating modes:
set temperature
Fan only mode: indoor
ambient temperature
Set temperature
6 n/a
Settings".
1
Four LED display panels
OPERATION LED flashes slowly
All LEDs off 3
OPERATION LED on
OPERATION and
DEF./FAN LEDs on
TIMER LED on 6