splits and multiSplit service information - …

1 - 1 - Split and Multi Split air conditioners service information Programming LG wired controllers 2 New type 2 Old type 7 Fault codes 9 Wall units (single split) 9 Universal split and multi split 10 Detailed explanation of fault codes 12 Thermistor calibration figures 27 Testing the diodes in the inverter circuit 29 Last update: 14/1/2011 - 2 - Programming LG wired controllers 1. New type PQRCUSA0 The new controller is model number same model is used for split and multi splits and for VRF.

2 There is a built-in receiver which responds to an infra red controller when used in ducted units. Updated 29/3/10 - 3 - User functions Setting the time Press the time button (13) for about 4 seconds until the display flashes Use the arrow keys to navigate around the sections and to set each item (hour, minutes, am/pm, day of week) Press OK/CLEAR (14) to confirm. Child lock The Child Lock is used to prevent unauthorised changes to the controller settings. The controller does not respond to any button, until the lock is released Repeat pressing the FUNCTION SETTING button (7) until the child lock sign appears Press OK/CLEAR button (14) to confirm.

3 CL will appear on the display Repeat the operation to release the child lock Vane angle control Repeat pressing the FUNCTION SETTING button (7) until the vane angle control sign appears The display would show a pair of numbers, for example example The number to the left (2 in this example) is the vane number to be controlled. The number on the right (P1 in this example) is the vane angle. Use the keys to get the left number to flash. Use the up/down keys to select the vane number to be adjusted.

4 The choice is 1,2,3,4 or All Use the left/right arrow keys to get the right hand number to flash. Then use the up/down keys to select the required angle. P1 directs the air closest to the ceiling; P6 provides the steepest downwards flow. Press OK/CLEAR (14) to confirm Press ESC to leave the programming mode (the controller would automatically leave the programming mode if left for 25 seconds) - 4 - Engineer functions The following functions can be programmed No. Function Function Code Value 1 Test run 18 minutes, cooling, high fan speed, 01 01:Set 2 Address setting 02 00 to FF : Address 3 ESP value for ducted units 03 01:Very low 02:Low 03: Medium 04:High 05:Very high 4 Room temperature thermistor 04 01:Remote controller sensor 02:Return air sensor 03:Both sensors 5 Ceiling height adjustment 05 01: Medium 02:Low 03:High 04:Very high 7 Two controllers on one indoor unit one must be master, one slave 07 00:Slave 01:Master 9 Dry contact 09 00:Off 01.

5 On 12 Centigrade to Fahrenheit 12 00:Centigrade 01: to Fahrenheit Group control No programming required on controller. See Product Sheet 98 for dip switch settings on indoor unit PCB The engineer functions are accessed by pressing the FUNCTION SETTING button for about 4 seconds, until the following appears on the display instead of the time-of-day: Once you are in the programming mode, the function number advances each time you press the FUNCTION SETTING key. Repeat pressing this key until you reach the function code you need to set.

6 When you have selected the function code, use the up/down arrow keys to obtain the required selection within that function code. Example: ceiling height adjustment (function 05) for medium ceiling height (selection 03) should display 05:03 Press the OK/CLEAR (14) to confirm the selection Then continue programming, or press the ESC button (8) to leave the programming mode (The programming mode exits automatically in any case after 25 seconds). - 5 - 7-Day Timer Setting (Technical sheet 107) Press the timer setting button (13) once, towards the bottom right side you ll see flashing.

7 Repeat pressing (3 times) until is flashing. Scroll across to the required day that you wish to set using the (15). Press down (15). You can now see the number 1 flashing. Each controller can be set to operate up to two time run periods each day. ie, Number 1 Number 2 1 signifies period one, 2 signifies period two. Press to scroll to between each period. To set the on/off time press once to select the hour on time and again to select the minute on time. The up down buttons will adjust the time.

8 Note that a hyphen appears on the right side of the 4 digit time. Now set the off time by pressing once. The hour time will now flash and the hyphen appears on the left side of the 4 digit time to signify the off time. Adjust the hour and minute time accordingly using the buttons. Press once to return back to the time run period selection. Press to scroll to the next time run period and press to exit back to the day selection and set the next day. To exit out completely press escape (8). To save settings press ok/clear (14).

9 Once fully out of the 7 day timer menu press escape once to show the current time on the display. A line will appear under any day that has a set run time. You can set a day not to run by using the holiday feature. This is ideal for operation Monday to Friday only. To set a holiday escape completely out from the weekly reservation settings and press the timer setting button once, towards the bottom right side you ll see flashing. Repeat pressing button (4 times), you will now see flashing.

10 Scroll across to the required day using the buttons, press the button to select. A line replaces that specific day to signify holiday set. Press button again to unselect. Press escape to exit out. - 6 - 2. Older wired controller The wired remote controller has the following main functions: Mode selection Mainly heating, cooling, and auto changeover at a specified temperature. Temperature selection The display shows the set temperature. Pressing the button with the house symbol displays the actual room temperature.