Sanyo SAP-KRV94EHDX 用户手册

 After 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 310 V) even after the power is turned OFF, and some time is required for the charge to dissipate. Be
careful 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 at 
least 5 minutes for the charge to dissipate if there is thought to be any trouble with the outdoor controller. 

After repairs are carried out, be sure to press and hold the TEST RUN button until the buzzer sounds 2 times to erase the 
diagnosis results.

1. If the operation lamp blinks every 0.5 seconds immediately when the power is turned ON, 

there is an external ROM (OTP data) failure on the indoor circuit board or ROM socket 

insertion problem, or the ROM has not been installed. Make sure the ROM is in existence.

2. The failure mode is stored in memory even when the power is not ON. Follow the procedure

below to perform diagnostics. 

Turn the power supply switch ON. However, the A/C itself should remain stopped.

Press and hold the TEST RUN button on the main unit controller until the buzzer sounds 1 time. 

At this time, releasing the TEST RUN button starts self-diagnostics.

If there is a sensor failure or a protective function has activated, self-diagnostics lamps 1, 2, and 3 will illuminate in the 

following pattern: 5 seconds blinking (illuminated) + 2 seconds OFF. (Buzzer sounds once while lamps are OFF.)

If there is no trouble, then self-diagnostics lamps 1, 2, and 3 do not illuminate, and the buzzer does not sound.

Diagnostics is completed when the buzzer sounds 3 times.

1.

2.

3.

4.

After repairs are carried out, be sure to press and hold the TEST RUN button until the buzzer 

sounds 2 times. When the TEST RUN button is released, the buzzer sounds 1 long beep, and 

the diagnosis results are erased.

If the indoor unit operation lamp is blinking every 0.5 seconds, follow the

procedure below to perform detailed trouble diagnostics. 

TEST 
RUN
button

Main unit controller

ON/OFF operation button