Injection Control (Linear Expansion Valve <Lev4>); Control At Initial Startup; Operation Mode - Mitsubishi Electric PUHY-M200YNW-A1 Service Handbook

[5-2 Outdoor Unit Control ]
5-2-13 Injection Control (Linear Expansion Valve <LEV4>)
LEV4 opening is adjusted every 30 seconds to keep the discharge temperature (TH4) within the predetermined range.
5-2-14

Control at Initial Startup

When started up for the first time before 12 hours have elapsed after power on, the unit goes into the initial startup mode.
At the completion of the initial operation mode on the OC, they will go into the normal control mode.
(1) (E)M200 - (E)M500YNW models
5-2-15

Operation Mode

(1) Indoor unit operation mode
The operation mode can be selected from the following 5 modes using the remote controller.
1 Cooling mode
2 Heating mode
3 Dry mode
4 Fan mode
5 Stopping mode
(2) Outdoor unit operation mode
1 Cooling mode
2 Heating mode
3 Stopping mode
When the outdoor unit is performing a cooling operation, the operation mode of the connected indoor units that are not in the
cooling mode (Stopped, Fan, Thermo-OFF) cannot be changed to heating from the remote controller. If this attempt is mode,
"Heating" will flash on the remote controller. The opposite is true when the outdoor unit is performing a heating operation. (The
first selection has the priority.)
20
- chapter 5
Initial startup mode starts.
50 F 60Hz
Completed in the integrated operation time of 35 minutes.
or F < 50Hz
Completed in the integrated operation time of 90 minutes.
or the discharge superheat (TH4 - Tc) is detected (within
5 minutes of startup) that remains above approximately
25 degrees for one minute or if the shell bottom SH
(TH15-Te) is 15 deg or above (for continuous 5 minutes)
10 minutes after start up.
Initial startup mode complete
All indoor units in operation are in cooling mode.
All indoor units in operation are in heating mode.
All indoor units are in fan mode or stopping mode.
BS_05_E