(5) Bypass solenoid valve control (SV1)
1) Control at cooling
1 While the compressor is stopped, the solenoid valve is OFF.
2 When the power is turned on, or when the compressor is restarted after it has been stopped for 30 minutes or
longer, if the liquid temperature (TH1) in 25 °C or higher then the solenoid valve turns ON for 2 minutes.
3 When the mode is changed from heating to cooling, solenoid valve operation conforms to item 2.
2) Control at heating
1 While the compressor is stopped, the solenoid valve is OFF.
2 When the power is turned on, or the compressor is restarted after it has been stopped for 30 minutes or longer,
the solenoid valve turns ON for 2 minutes.
3 When the mode is changed from cooling to heating, the solenoid valve turns ON for 2 minutes at starting.
4 When the control pressure switch (63H2) trips, the solenoid valve turns ON.
5 If 63H2 resets 15 minutes after tripping, the solenoid valve turns OFF.
6 During defrosting, the solenoid valve turns ON.
(6) Service functions
1) Abnormality history clear
1 When DIP SW1-2 is turned ON while the compressor is operating or stopped, the abnormality history is cleared.
Function of switch on indoor circuit board (indoor unit)
1)
DIP SW1 for model Selection (DIP SW1 has been set at factory)
2)
PEH-10MYB : SW1-1, -4 ON, SW1-2, -3, -5 OFF PEH-7, 8MYB : SW1-2, -4 ON, SW1-1, -3, -5 OFF
DIP SW2 for Capacity Setting (DIP SW2 has been set at factory)
3)
PEH-7, 8, 10MYB : SW2-1, -2, -3 and, -4 OFF
DIP SWE for Emergency Operation
When SWE is turned ON, FAN turns ON. Setting of emergency operation other than SWE is
performed at the outdoor unit.
ON
OFF
54321
ON
OFF
4321
ON
OFF
ON
OFF
54321
(7)
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