![background image](http://html1.mh-extra.com/html/daikin/super-multi-nx-g-series/super-multi-nx-g-series_service-manual_4705809167.webp)
SiUS12-928_A
Check
Service Diagnosis
158
6.1.14 Hall IC Check
Check No.16
1. Check the connector connection.
2. With the power on, operation off, and the connector connected, check the following.
∗
Output voltage of about 5 V between pins 1 and 3.
∗
Generation of 3 pulses between pins 2 and 3 when the fan motor is operating.
If NG in step 1
Defective PCB
Replace the PCB.
If NG in step 2
Defective Hall IC
Replace the fan motor.
If OK in both steps 1 and 2
Replace the PCB.
6.1.15 Main Circuit Short Check
Check No.29
Measure the resistance between pins at both ends of DB1.
If the resistance is
∞
or less than 1 k
Ω
, the main circuit short.
1
Gray (power supply)
Purple (signals)
Blue (grounding)
2
3
(R12398)
S7
(–) terminal of the tester
(in case of digital,
(+) terminal)
(~)
(+)
(~)
(–)
(+) terminal of the tester
(in case of digital,
(–) terminal)
(+)
(~)
(–)
(~)
Resistance in OK
several k
Ω
~several M
Ω
∞
∞
several k
Ω
~several M
Ω
Resistance in NG
0 or
∞
0
0
0 or
∞
TB2
>PS<
TB3
P2
N1
S90
S92
S93
S80
S20
S21 S22
S40
(R11690)
DB1
+
–
~
~
Summary of Contents for SUPER MULTI NX G Series
Page 1: ...SiUS12 928_A Applied Models Inverter Multi Heat Pump G Series J Series...
Page 7: ...SiUS12 928_A Table of Contents vi...
Page 10: ...SiUS12 928_A 1 List of Functions Part 1 List of Functions 1 Functions 3...
Page 11: ...SiUS12 928_A List of Functions 2...
Page 17: ...SiUS12 928_A Specifications 8...
Page 23: ...SiUS12 928_A Specifications Specifications 14...
Page 25: ...SiUS12 928_A Printed Circuit Board Connector Wiring Diagram 16...
Page 37: ...SiUS12 928_A Function and Control 28...
Page 69: ...SiUS12 928_A Control Specification Function and Control 60...
Page 71: ...SiUS12 928_A Operation Manual 62...
Page 73: ...SiUS12 928_A Duct Free System Operation Manual 64 2 Duct Free System 2 1 Remote Controller...
Page 84: ...Duct Free System SiUS12 928_A 75 Operation Manual...
Page 85: ...SiUS12 928_A Duct Free System Operation Manual 76 2 8 TIMER Operation...
Page 86: ...Duct Free System SiUS12 928_A 77 Operation Manual...
Page 87: ...SiUS12 928_A Duct Free System Operation Manual 78 2 9 Note for Multi System...
Page 88: ...Duct Free System SiUS12 928_A 79 Operation Manual...
Page 97: ...SiUS12 928_A Slim Duct Built In System Operation Manual 88...
Page 99: ...SiUS12 928_A Service Diagnosis 90...
Page 169: ...SiUS12 928_A Removal Procedure 160...
Page 225: ...SiUS12 928_A Trial Operation and Field Settings 216...
Page 235: ...SiUS12 928_A Appendix 226...