Indoor Unit Electric Control Functions; Cooling Mode; Characteristic Of Electronic Expansion Valve (Eev); Fan Motor Control - Haier H-MRV Series Service Manual

8.3 Indoor unit electric control functions

1. Cooling mode

1.1 Temperature control range: 16℃~30℃, and the precision is ±1℃

1.2 Characteristic of electronic expansion valve (EEV)

After EEV opens (base angle is 200), in 5 minutes, it will not be controlled by thermostat OFF, but
controlled by the overheat value. In this period, if thermostat is OFF, no response, when it is 5 minutes,
the unit will send the signal of Area 0. In 5 minutes, if the remote controller shuts off the thermostat and
the unit, at this time, the unit will not be limited by the overheat value, and you can set the EEV at the
standby open angle and emit the signal of Area 0.

1.3 Fan motor control

Temperature difference 1℃
Auto speed:
In cooling mode
TA-TS
+2
high
+1
med
0
After the thermostat is OFF, EEV will be controlled by fan motor: set EEV at the standby open angle, fan
motor is low speed.
1.4 Set temperature compensation
How to change temp. compensation: By using the SWING button (if no SWING, use SLEEP) to set
EEPROM, for example:
in heating mode, press "ON/OFF" button, taking set temperature 24℃ as base point, at this temperature
press SWING (SLEEP) button 7 times within 5 seconds, the buzzer sounds two times and enters the
temp. compensation set mode in heating, at this time, if you shut off the unit when the adjusted
temperature is 25℃, the temp. compensation is +1℃. If you shut off the unit when the adjusted temp. is
26℃, the temp. compensation is +2℃, and so on. The max temp. compensation is 6℃(adjusted temp. is
30℃). And if you want to cancel temp. compensation, set the temperature back to 24℃.
In cooling mode, press "ON/OFF" button, taking set temperature 24℃ as base point, at this temperature
press SWING (SLEEP) button 7 times within 5 seconds, the buzzer sounds two times and enters the
temp. compensation set mode in cooling, at this time, if you shut off the unit when the adjusted
temperature is 23℃, the temp. compensation is -1℃. If you shut off the unit when the adjusted temp. is 22
℃, the temp. compensation is -2℃, and so on. The max temp. compensation is -8℃(adjusted temp. is 16
℃). And if you want to cancel temp. compensation, set the temperature back to 24℃.
The above are for remote control type.
If at wired control type, the temp. compensation function is set in EEPROM, and fixed as 4℃ when out of
factory.
1.5 Anti-freezed protection
low
-105-
>a__WcU[S^ <[c >a`V[e[a`Wc