Mitsubishi PWFY-P36NMU-E-BU Service Handbook page 43

5. Control at initial startup
• When the unit is started for the first time, it will run the following course of operation.
<Flow chart of initial operation mode>
✻Do not operate the unit in the initial operation mode 12 or more hours after power on.
6. Control box cooling System <PWFY-P36NMU-E-BU>
On the PWFY-P36NMU-E-BU model, the cooling fan operates for the period between one minute before
compressor startup and one minute after compressor stoppage to prevent INV temperature from rising.
7. Super heat control of the high-side (R134a) of the binary cycle.
(Linear expansion valve <LEV>) <PWFY-P36NMU-E-BU>
(1) LEV 2 control
(a) LEV2 control range.
0 LEV 2 480 pulses
(b) LEV2 Control method
Hot Water
Pd/Ps < 1.7
Pd/Ps 1.7
*TdSH = TH11 - T(63HS)
*Pd/Ps = 6SHS/63LS
*SH = TH13 - T(63LS)
8. Operation mode
(1) Unit operation modes
An operation mode can be selected from the following modes on the remote controller.
PWFY-P36NMU-E-BU
1
Hot Water
2
Less than 12 hours after power on
Initial operation mode begins
Frequency is fixed at 25 Hz for one minute after startup.
Initial operation mode completed
TdSH 15
TdSH > 15
PWFY-P36 , P72NMU-E/E2-AU
-
- 40 -
SH < 2
2 < SH < 4
4 SH 5
5 < SH 7
7 < SH
Heating
Cooling
LEV2
Down
Down
Down
Down
0
Up
Up