Panasonic CS-KS12NB41 & CZ-18BT1U + CU-KS12NK1A Technical & Service Manual

Also see for CS-KS12NB41: Operating instructions

Contents

Panasonic CS-KS12NB41 & CZ-18BT1U + CU-KS12NK1A Technical & Service Manual Manual pdf 53 page image

(2) If the self-diagnostics function fails to operateCheck the indoor unit.Is the fuse blown?Replace the controller.Replace the circuitboard or the fuse.No indicators illuminate and theindoor fan does not rotate.Check the power voltage.••NormalBlown9-3. Checking the Indoor and Outdoor Units(1) Checking the indoor unit(2) Checking the outdoor unitUsing the TEST/T-RUN terminalsControlNo. Check items (unit operation)T-RUN : Test run (compressor and fan motor turn ON).TEST/MV : Compresses time to 1/60th (acceleratesoperation by 60 times faster than normal).Use the remote controller to operate theunit in "TEST run" mode. To determinewhether the mode is currently in"TEST run" mode, check the 3 indicatorlamps on the unit. If all 3 are blinking,the current mode is "TEST run."If there are no problems with the above, then check the outdoor unit.1 The rated voltage must be present between inter-unit wirings 1 and 2.Connect a 5 k ohm resistor between inter-unit wirings 2 and 3. When thevoltage at both ends is measured, approximately 12 to 15V DC mustbe output and the multimeter pointer must bounce once every 8seconds.Or instead of measuring the voltage, you can insert an LED jig andcheck that the LED flickers once every 8 seconds.••ControlNo. Check items (unit operation)Apply the rated voltage between outdoorunit terminals L and N.If there are no problems with the above, then check the indoor unit.1 The control panel LED (red) must illuminate.Short-circuit the outdoor unit COM terminalto the T-RUN terminal.2 The compressor, fan motor and 4-way valve must all turn on.••TEST/T-RUN terminals(TEST)/MV T-RUN COMFor the "Test run" procedure, refer to the Appendix B "Installation Instructions".53