LG LM-3060HL Service Manual ▷ View online
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<OUTDOOR UNIT>
1. Solenoid Valve Control
Solenoid valve controls mass of liquid flow of each unit.
(1) Before starting condition
• All teh solenoid valves are off.
(2) In operating mode
¥L
Heating operating mode
• After solenoid valve of each unit operated is ON,
the solenoid valve of units not operated also in ON 30 seconds later.
• But the solenoid valve for by-pass is always OFF.
¥M
Cooling operating mode
• Operating single unit: The solenoid valve operated and the valve for by-pass is ON.
• Operating dual unit: The solenoid valve of each unit operated is ON.
• Operating triple unit: The solenoid valve of each unit operated is ON.
(3) Stopping condition
The solenoid valve is off 3 minutes later.
2. Outdoor Fan Control
• Outdoor fan is set as control of the compressor. That is, as compressor operated, outdoor fan is operated.
• In heatin goperating mode, if discharge pressure of the compressor has been above 24kg/cm
2
g outdoor fan is
off, but if the discharge pressure has been below 20kg/cm
2
g, the outdoor fan is on.
1. Do not operate "cooling" and "heating" operation at the same time.
It may cause troubles.
2. If you operate only one or two indoor units among the three units in heating mode.
1) You mau slightly feel heating sense from the remaining (non-operated) unit(s).
(This product is designed to operate the solenoid valves of outdoor unit and to pass the refrigerant to the
indoor units even you use only one indoor unit out of three units in heating operation)
indoor units even you use only one indoor unit out of three units in heating operation)
2) Fan operation of the remaining (non-operated) units is not to be made in case of the above condition.
CAUTION
• Cooling, Soft Dry, Fan, Heating
• Timer Mode
• Sleep Mode
• Deice control mode
• Hot-Start control mode
1. Test Mode
Test operation will be setted by pushing the tact switch (SW1) in teh MAIN P.C.B ASM. Each test operation by
pushing count of tact switch is as well as the following.
pushing count of tact switch is as well as the following.
• 1 time push: Ignore Communication control (
¤B
operate indoor unit only)
• 2 times push: Shorten the proceeding time (1 min
¡
1 sec)
• 3 times push: Shorten the prceeding time (1 hour
¡
1 sec)
• 4 times push: All LED ON
• 5 times push: Fan: LOW
• 6 times push: Fan: MED
• 7 times push: Fan: HIGH
• 8 times push: Reset
Note)
For normal operation after checking by test mode, you should press SW1 8 times for resetting or reconnect the
power cord.
power cord.
1. Protection of the evaporator coil from frosting
If the temperature of the indoor coil is below 0°C after 7 mins from starting the compressor, the compressor and
the outdoor fan is stopped, and then after 3 mins delay of the compressor and the temperature of the indoor coil
is over 7°C, the compressor and the outdoor fan is reoperated.
the outdoor fan is stopped, and then after 3 mins delay of the compressor and the temperature of the indoor coil
is over 7°C, the compressor and the outdoor fan is reoperated.
2. Thermistor Cut Off or Short
Blinks on and off the operation mode LED 1 times.
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Display Function
Self-diagnosis Function
Operation Indicator
Timer Indicator
Sleep Timer Indicator
Deice Indicator
: Heating model only
• Cooling, Soft Dry, Fan, Heating
• Timer Mode
• Sleep Mode
• Deice control mode
• Hot-Start control mode
1. Test Mode
Test operation will be setted by pushing the tact switch (SW1) in teh MAIN P.C.B ASM. Each test operation by
pushing count of tact switch is as well as the following.
pushing count of tact switch is as well as the following.
• 1 time push: Ignore Communication control (
¤B
operate indoor unit only)
• 2 times push: Shorten the proceeding time (1 min
¡
1 sec)
• 3 times push: Shorten the prceeding time (1 hour
¡
1 sec)
• 4 times push: All LED ON
• 5 times push: Fan: LOW
• 6 times push: Fan: MED
• 7 times push: Fan: HIGH
• 8 times push: Reset
Note)
For normal operation after checking by test mode, you should press SW1 8 times for resetting or reconnect the
power cord.
power cord.
1. Protection of the evaporator coil from frosting
If the temperature of the indoor coil is below 0°C after 7 mins from starting the compressor, the compressor and
the outdoor fan is stopped, and then after 3 mins delay of the compressor and the temperature of the indoor coil
is over 7°C, the compressor and the outdoor fan is reoperated.
the outdoor fan is stopped, and then after 3 mins delay of the compressor and the temperature of the indoor coil
is over 7°C, the compressor and the outdoor fan is reoperated.
2. Thermistor Cut Off or Short
Blinks on and off the operation mode LED 1 times.
- 18 -
Display Function
Self-diagnosis Function
Operation Indicator
Timer Indicator
Sleep Timer Indicator
Deice Indicator
: Heating model only
• Cooling, Soft Dry, Fan, Heating
• Timer Mode
• Sleep Mode
• Deice control mode
• Hot-Start control mode
1. Test Mode
Test operation will be setted by pushing the tact switch (SW1) in teh MAIN P.C.B ASM. Each test operation by
pushing count of tact switch is as well as the following.
pushing count of tact switch is as well as the following.
• 1 time push: Ignore Communication control (
¤B
operate indoor unit only)
• 2 times push: Shorten the proceeding time (1 min
¡
1 sec)
• 3 times push: Shorten the prceeding time (1 hour
¡
1 sec)
• 4 times push: All LED ON
• 5 times push: Fan: LOW
• 6 times push: Fan: MED
• 7 times push: Fan: HIGH
• 8 times push: Reset
Note)
For normal operation after checking by test mode, you should press SW1 8 times for resetting or reconnect the
power cord.
power cord.
1. Protection of the evaporator coil from frosting
If the temperature of the indoor coil is below 0°C after 7 mins from starting the compressor, the compressor and
the outdoor fan is stopped, and then after 3 mins delay of the compressor and the temperature of the indoor coil
is over 7°C, the compressor and the outdoor fan is reoperated.
the outdoor fan is stopped, and then after 3 mins delay of the compressor and the temperature of the indoor coil
is over 7°C, the compressor and the outdoor fan is reoperated.
2. Thermistor Cut Off or Short
Blinks on and off the operation mode LED 1 times.
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Display Function
Self-diagnosis Function
Operation Indicator
Timer Indicator
Sleep Timer Indicator
Deice Indicator
: Heating model only