Panasonic CS-MKE7NKU Technical & Service Manual

Also see for CS-MKE12NKU: Submittal data

Contents

Panasonic CS-MKE7NKU Technical & Service Manual Manual pdf 35 page image

1HR.TIMERbuttonON/OFFoperationbuttonACL(Reset)buttonQUIETbutton< Clock display >Test run modeSelf-diagnostics mode8. TROUBLESHOOTING (BEFORE CALLING FOR SERVICE)8-1. Precautions before Performing Inspection or RepairNOTEPROCEDUREAfter checking the self-diagnostics monitor, turn the power OFF before starting inspection or repair.High-capacity electrolytic capacitors are used inside the outdoor unit controller (inverter). They retain an electrical charge(charging voltage DC 310V) even after the power is turned OFF, and some time is required for the charge to dissipate. Becareful not to touch any electrified parts before the controller LED (red) turns OFF.If the outdoor controller is normal, approximately 30 seconds will be required for the charge to dissipate. However, allow atleast 5 minutes for the charge to dissipate if there is thought to be any trouble with the outdoor controller.1: If the operation lamp blinks every 0.5 seconds immediately when thepower is turned ON, there is an external ROM (OTP data) failure on theindoor circuit board, or a ROM socket insertion problem, or the ROMhas not been installed.2: The failure mode is stored in memory even when the power is not ON.Follow the procedure below to perform diagnostics.8-2. Method of Self-DiagnosticsFollow the procedure below to perform detailed trouble diagnostics.Step 1: Press and hold the remote controller QUIET button and 1 HRTIMER button. At the same time, press the ACL (reset) button. Usea pointed object such as the tip of a pen to press the ACL button.When this has been done, "oP-1" (test run) appears, blinking, inthe remote controller clock display area.Step 2: Next, press the 1 HR TIMER button once to change the displayfrom "oP-1" to "oP-3" (self-diagnostics). (The display continues toblink.)Step 3: Finally press the ON/OFF button to engage self-diagnostics mode.• The self-diagnostics function utilizes the 3 indicator lamps on the mainunit, in combinations of ON lamps, blinking lamps, and OFF lamps, toreport the existence of sensor trouble or a protective operation. (Thelamps blink or remain ON for 5 seconds, then turn OFF for 2 seconds.)Self-diagnostics is completed when the buzzer sounds 3 short beeps.• A maximum of 3 self-diagnostics reports are displayed, for 5 secondseach, beginning with the most recent report. Following this display thelamps turn OFF. In order to view the self-diagnostics results again, pressthe ON/OFF button again.• The 3 lamps remain OFF if no trouble has occurred. After self-diagnostics is completed, be sure to press theACL (reset) button to return to normal mode. The airconditioner will not operate if this is not done.After turning on power to the air conditioner, use the remote controller andfollow the steps below to execute self-diagnostics.35