How to Diagnose Trouble in Outdoor Unit

11-8. How to Diagnose Trouble in Outdoor Unit

11-8-1. Summarized Inner Diagnosis of Inverter Assembly

Table 11-8-1

Diagnosis/Process flowchart			Item	Contents	Summary

			Preparation	Turn “OFF” the power supply
Remove connector				breaker, and remove 3P
Remove connector				connector which connects
of compressor.				inverter and compressor.
					If fuse was blown, be sure to
					If fuse was blown, be sure to
Check 25A fuse		NG	Check	• Check whether 25A fuse	check the electrolytic
(Part No.F01).				on the control board	capacitor and diode block.
	OK			assembly is blown or not.	(DB01)
				assembly is blown or not.	(DB01)
		Replace fuse.	Check	(F01)	• Connect discharge
		Replace fuse.		(F01)


					resistance (approx. 100Ω,
					resistance (approx. 100Ω,
		Check			40W) or soldering iron
		electrolytic			(plug) between +, –
		capacitor, diode			terminals of the electrolytic
		block (DB01),			capacitor (500µF) of C14
		etc.			capacitor (500µF) of C14
		etc.			(with printed CAUTION
					(with printed CAUTION
					HIGH VOLTAGE) on P.C.
					board.
					Discharging position
Check					Discharging position
Check		NG			(Discharging period
terminal voltage					(Discharging period
terminal voltage					10 seconds or more)	Plug of
of electrolytic					10 seconds or more)	Plug of
capacitor.						soldering
capacitor.						iron
	OK	Check				iron
	OK	Check
		electrolytic
		capacitor, diode
		(DB01),
		etc.

Does outdoor

Operation

Turn on the power breaker,

fan rotate?

YES

and operate the air condi-

tioner in COOL mode by time

OK if 500µF →

shortening.

DC280 to 380V

Measure-

Measure terminal voltage of

ment

the electrolytic capacity.

Remove CN300 while

pushing the part indicated

500µF:400WV × 3

by an arrow because CN300

After operation, turn off the

is a connector with lock.

Remove connector

Check

power breaker after 2

CN300 of outdoor fan

minutes 20 seconds passed,

motor, and using a

tester, check resistance

and discharge the electrolytic

value between every

Stop

capacitor by soldering iron.

phases at motor side.

Check voltage between

motor phases.

Check

• Is not winding between Q-

Replace

Measure-

R‚ R-S, or Q-Sopened

outdoor

→ Resistance between

fan motor.

ment

or short-circuited?

phases should be

• Is not frame grounded with

approx. 55 to 77Ω

Q, R, or S?

→ Should be 10MΩ or

more.

– 82 –

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Models: RAS-10SAVP-E RAS-B10SKVP-E RAS-B13SKVP-E

11-8. How to Diagnose Trouble in Outdoor Unit

11-8-1. Summarized Inner Diagnosis of Inverter Assembly

Diagnosis/Process flowchart

Contents

Summary

RAS-10SAVP-E, RAS-B10SKVP-E, RAS-B13SKVP-E specifications