LG Multi V 5 - FN 12 Compressor Max. Frequency Limit; Auto Dust Removal Mode

224 225
_TROUBLE SHOOTING GUIDE BOOK __
This function is able to improve the heat exchange efficiency to maintain clean state on heat exchanger of
ODU. Dust is removed on heat exchanger of outdoor unit by reverse rotation of fan.
■ Setting the function
Function Option
Auto Dust Removal Mode Fn 11 oFF, op1~op5
■ Option Selection
Setting
Reverse cycle fan
runtime (min)
Time delay
between cycles
Number of
cycles
oFF
- - -
op1 5 2 hours No limit
op2 5 2 hours 2
op3 3
5 minutes
(following compressor shutdown)
1
op4 1
- 1
op5 1 1 2
■ Detailed information
• This function is used with heat pump and heat recovery.
• Cooling and Dry modes is a change in the setting impact.
• The operating symptoms that might be corrected using this function
When the outdoor unit is installed in arid climates, where moisture levels are very low, this option
can be selected to assist with keeping outdoor unit coil heat transfer optimized.
• The op3 selection requires the Multi V demand limit I/O PCB board be installed. If the demand limit
controller is installed in the master outdoor unit and a binary signal is sent to the outdoor unit via a
third party source, VRF system normal operation can be interrupted and an auto dust removal cycle
can be performed.
4.11 Auto Dust Removal Mode
· Ask an authorized technician to setting a function.
· If do not use a function, set an off-mode.
· This option is not a substitute for coil cleaning and does not completely clear the coil of all debris.
A coil cleaning procedure should be included when performing regular preventative maintenance.
It is a function to limit the maximum speed (frequency) of inverter compressor.
■ Setting the function
Function Option
Compressor Max. Frequency Limit Fn 12 oFF, op1~op9
■ Option Selection
Setting Inverter (Hz) Setting Inverter (Hz)
oFF - op5 113
op1 143 op6 105
op2 135 op7 98
op3 128 op8 90
op4 120 op9 83
■ Detailed information
• This function is used with heat pump and heat recovery.
• All modes is a change in the setting impact.
• The operating symptoms that might be corrected using this function
Setting the maximum compressor speed can be a method to artificially downsize an outdoor unit
either temporarily until all indoor units are installed on a core and shell project or permanently on
projects where the outdoor unit installed has excess capacity on both heating and cooling design
days.
*Note : If interested in this option, please note there is no concern a selection will inhibit proper
defrost or oil return operation. The oil return requires algorithm operates the compressor at
speeds that are lower than the available minimum speed selectable.
4.12 Compressor Max. Frequency Limit
· Ask an authorized technician to setting a function.
· If use a function, first install a central controller. (refer to the Installation manual)
· Do not depend on this option to lower the maximum current draw of the outdoor unit. The maximum
speed selected is ignored by the Multi V microprocessor during defrost.
Basic Part
Multi V 5
Intorduction
Trouble Shooting
Function Control
Back
Basic PartBasic PartBasic PartBasic Part