When The Air Conditioner Does Not Work At All (Both Indoor And Outdoor Units) - Operation Lamp Does Not Light; Operation Lamp Blinks (It Keeps Blinking After 3 Minutes Following Start Of Operation) - Sanyo CG1411 Service Manual

12-2. When the Air Conditioner Does Not Work at All (Both Indoor and
Outdoor Units) — Operation Lamp Does Not Light
12-2-1. Malfunction in Power Supply
Check if operation selector of the indoor unit is set to ON. If it is not, set the switch to ON.
Check if the circuit breaker is disengaged or if electricity is not being supplied properly.
Normal AC 104 – 126 V
In case of abnormality
12-2-2. Abnormalities in Power Transformer
Check voltage on the secondary core side.
Measure voltage 2P connector of TRANS 2 (without disconnecting connectors).
Normal TRANS 2
Caution: Care should be taken that the tips of the tester rods do not touch each other since the circuit is
electrically charged.
In case of abnormality
12-3. Operation Lamp Blinks (It Keeps Blinking after 3 Minutes Following
Start of Operation)
If the operation lamp continues to blink more than 3 minutes, check for the following possible causes in this order:
(1) Incorrect Wiring of Inter-unit Wiring (connector No. 1 – 4)
(2) Thermistor Abnormality (Indoor Unit Only)
(3) Protective Circuit of Outdoor (Burner) Unit Operated (during heating operation only)
(4) CT Detection
(5) Indoor Fan is Defective
(6) Power Circuit Wiring Error
(7) Outdoor Unit Power Supply Failure
(8) Outdoor Unit Power Transformer Defective
(9) Outdoor Unit Compressor Motor Overload Relay Has Operated
(10) Outdoor Unit Compressor Motor Defective
12-3-1. Incorrect Wiring of Inter-unit Wiring
If the blinking of the operation lamp occurs upon initial operation following installation work, incorrect wiring of
inter-unit cable between indoor and outdoor units is likely. Correctly rewire the inter-unit cable.
Caution: Be sure to turn off the circuit breaker switch before carrying out the wiring work.
* Use a circuit tester (set to AC range).
Check power source
BRN – BRN AC 12 – 18 V
Replace the power transformer.
No abnormalities, proceed to 12-2-2.
* Use a circuit tester (set to AC range).
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