Selection Of The Annual Cooling Function; High Power Operation; Economy Operation - Mitsubishi Heavy Industries SRF25ZS-W Service Manual

(5) Selection of the annual cooling function

(a) The annual cooling control is valid from factory default setting. It is possible
to disable by cutting jumper wire (J172), or changing the setting of DIP switch
(SW2-4) on the interface kit (option) PCB if it is connected.
Jumper wire
(J172)
Shorted
Shorted
Open
Open
Note: (1) Default states of the jumper wire (J172) and the interface kit at the shipping from factory – On the
PCB, the DIP switch (SW2-4) is set to enable the annual cooling function.
(2) To cancel the annual cooling setting, consult your dealer.
(b) Content of control
(i) If the outdoor air temperature sensor (TH3) detects below 5°C, the indoor
unit speed is switched to 8th step.
(ii) If the outdoor air temperature sensor (TH3) detects higher than 7°C, the indoor unit speed is changed to the normal con-
trol speed.

(6) High power operation

Pressing the HI POWER/ECONO button intensifies the operating power and initiates powerful cooling and heating operation
for 15 minutes continuously. The wireless remote control displays and the FAN SPEED display disappears.
(a) During the HIGH POWER operation, the room temperature is not controlled. When it causes an excessive cooling and
heating, press the HI POWER/ECONO button again to cancel the HIGH POWER operation.
(b) HIGH POWER operation is not available during the DRY and the program timer operations.
(c) When HIGH POWER operation is set after ON TIMER operation, HIGH POWER operation will start from the set time.
(d) When the following operation are set, HIGH POWER operation will be canceled.
① When the HI POWER/ECONO button is pressed again.
② When the operation mode is changed.
③ When it has been 15 minutes since HIGH POWER operation has started.
(e) Not operable while the air-conditioner is OFF.
(f) After HIGH POWER operation, the sound of refrigerant flowing may be heard.

(7) Economy operation

Pressing the HI POWER/ECONO button initiate a soft operation with the power suppressed in order to avoid an excessive
cooling or heating. The unit operate 1.5°C higher than the setting temperature during cooling or 2.5°C lower than that during
heating. The wireless remote control displays ECONO mark and the FAN SPEED display disappears.
(a) It will go into ECONOMY operation at the next time the air-conditioner runs in the following cases.
① When the air-conditioner is stopped by ON/OFF button during ECONOMY operation
② When the air-conditioner is stopped in SLEEP or OFF TIMER operation during ECONOMY operation
③ When the operation is retrieved from CLEAN operation
(b) When the following operation are set, ECONOMY operation will be canceled.
① When the HI POWER/ECONO button is pressed again
② When the operation mode is changed DRY to FAN
③ When the NIGHT SETBACK botton is pressed
(c) Not operable while the air-conditioner is OFF.
(d) The setting temperature is adjusted according to the following table.
Mode
Cooling
Item
①＋0.5
Temperature
②＋1.0
adjustment
③＋1.5
Interface kit
(SC-BIKN2-E)
SW2-4
ON
OFF
ON
OFF
Heating
① at the start of operation
①− 1.0
②− 2.0 ② one hour after the start of operation
③− 2.5
③ two hours after the start of operation
4
- -
Function
Enabled
Disabled
Disabled
Disabled
Jumper wire (J172)
④ When the SILENT botton is pressed.
⑤ When the NIGHT SETBACK botton is pressed.
'20 • SRF-SM-311
ON
OFF
5 7
Outdoor air temperature ( C)