Daikin ERQ Series, Service Manual

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ESiEN09-06 A
ii Table of Contents
5.2 Demand Operation .................................................................................43
5.3 Heating Operation Prohibition ................................................................43
6. Outline of Control ..................................................................................44
6.1 Thermostat Sensor in Remote Control (only for Z-control) ....................44
6.2 Hot Start Control (In Heating Operation Only)........................................45
6.3 Freeze Prevention ..................................................................................46
6.4 Low Outdoor Air Temperature Protection Control ..................................47
1. Different Systems with their Control Boxes...........................................50
1.1 System A: PAIR......................................................................................50
1.2 System B: MULTI ...................................................................................52
2. W-, X-, Y-, Z-Control .............................................................................55
2.1 W-Control ...............................................................................................55
2.2 X-Control ................................................................................................57
2.3 Y-Control ................................................................................................58
2.4 Z-Control ................................................................................................58
3. Wiring Diagram of Control Box..............................................................60
3.1 D-box......................................................................................................60
3.2 F-box ......................................................................................................61
4. Attention Points .....................................................................................62
5. System A: EKEQF & EKEQD-box: Installation and Operation
Manual ..................................................................................................63
6. System B: EKEQM-box: Installation and Operation Manual .................84
1. Test Operation ......................................................................................98
1.1 Installation Process ................................................................................98
1.2 Procedure and Outline ...........................................................................99
1.3 Operation When Power is Turned On ..................................................112
2. Outdoor Unit PC Board Layout ...........................................................113
3. Field Setting ........................................................................................114
3.1 Field Setting from Remote Controller ...................................................114
3.2 Field Setting from Outdoor Unit............................................................123
1. Symptom-based Troubleshooting .......................................................179
2. Troubleshooting by Remote Controller ...............................................182
2.1 The INSPECTION / TEST Button.........................................................182
2.2 Self-diagnosis by Wired Remote Controller .........................................183
2.3 Remote Controller Service Mode .........................................................184
2.4 Remote Controller Self-Diagnosis Function .........................................186
3. Troubleshooting by Indication on the Remote Controller ....................193
3.1 “A0” AHU: Error of External Protection Device.....................................193
3.2 “A1” AHU: PC Board Defect .................................................................194
3.3 “A3” AHU: Malfunction of Drain Level Control System (S1L) ...............195