![background image](http://html.mh-extra.com/html/daikin/2mks40g2v1b/2mks40g2v1b_service-manual_501075005.webp)
SiBE12-816_D
Table of Contents
iv
6. Troubleshooting for SA Indoor Unit - FFQ Series ...............................223
6.1
Indoor Unit PCB Abnormality ...............................................................223
6.2
Drain Water Level System Abnormality................................................224
6.3
Fan Motor or Related Abnormality .......................................................226
6.4
Drain System Abnormality....................................................................227
6.5
Thermistor or Related Abnormality.......................................................228
6.6
Remote Controller Thermistor Abnormality ..........................................230
6.7
Signal Transmission Error
(between Indoor Unit and Remote Controller)......................................231
6.8
Signal Transmission Error
(between MAIN Remote Controller and SUB Remote Controller)........232
6.9
Field Setting Abnormality .....................................................................233
7. Troubleshooting for Outdoor Unit........................................................235
7.1
Anti-icing Control for Indoor Unit ..........................................................235
7.2
OL Activation (Compressor Overload) .................................................237
7.3
Compressor Lock .................................................................................238
7.4
DC Fan Lock ........................................................................................239
7.5
Input Overcurrent Detection .................................................................240
7.6
Discharge Pipe Temperature Control...................................................241
7.7
High Pressure Control in Cooling .........................................................242
7.8
Compressor Sensor System Abnormality ............................................243
7.9
Position Sensor Abnormality ................................................................244
7.10 DC Voltage / Current Sensor Abnormality............................................246
7.11 Thermistor or Related Abnormality (Outdoor Unit)...............................247
7.12 Electrical Box Temperature Rise..........................................................249
7.13 Radiation Fin Temperature Rise ..........................................................250
7.14 Output Overcurrent Detection ..............................................................252
7.15 Refrigerant Shortage ............................................................................254
7.16 Low-voltage Detection or Over-voltage Detection................................256
7.17 Outdoor Unit PCB Abnormality or Signal Transmission Error ..............257
7.18 Unspecified Voltage (between Indoor Unit and Outdoor Unit) /
Anti-icing control in Other Room ..........................................................260
8. Check ..................................................................................................261
8.1
Thermistor Resistance Check ..............................................................261
8.2
Fan Motor Connector Output Check ....................................................262
8.3
Hall IC Check .......................................................................................262
8.4
Power Supply Waveforms Check.........................................................262
8.5
Electronic Expansion Valve Check.......................................................263
8.6
Four Way Valve Performance Check ...................................................264
8.7
Inverter Unit Refrigerant System Check...............................................265
8.8
“Inverter Checker” Check .....................................................................266
8.9
Rotating Pulse Input on the Outdoor Unit PCB Check .........................268
8.10 Installation Condition Check.................................................................269
8.11 Discharge Pressure Check...................................................................269
8.12 Outdoor Unit Fan System Check..........................................................270
8.13 Main Circuit Short Check......................................................................270
8.14 Power Module Check ...........................................................................271
Part 7 Removal Procedure ........................................................272
1. Outdoor Unit........................................................................................273
1.1
Removal of Outer Panels .....................................................................273