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Daikin
Air Conditioner
VRVII
Daikin VRVII User Manual
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Troubleshooting b
y Indication on the Remot
e Controller
102
3.24
E4
Actuation of Low Pressure
Sensor
Remote Controller Display
E4
Applicable Models
VRVII and II-S Series
Method of Error Detection
Error Decision Conditions
Error is generated when the low pressure
is dropped
under specific pressure.
Supposed Causes
Abnormal drop of low pressure
Defective low pressure sensor
Defective outdoor unit PCB
Stop valve is not opened.
106
108
Table of Contents
Default Chapter
2
Table of Contents
2
Applicable Model Series
6
Applicable Models
7
VRVII M(A) Series
7
VRVII-S M Series
8
R-410A
9
VRVIII-Q P Series
14
1 Symptom-Based Troubleshooting
17
2 Troubleshooting by Remote Controller
23
The INSPECTION / TEST Button
23
Self-Diagnosis by Wired Remote Controller
24
Wired Remote Controller
24
Checking an Error or Warning
25
Wired Remote Controller
25
Taking Corrective Action
26
Self-Diagnosis by Wireless Remote Controller
27
Indoor Unit
29
2.4 Error Codes and Description
29
Outdoor Unit
33
2.5 Error Codes - Sub Codes
40
Outdoor Unit
43
3 Troubleshooting by Indication on the Remote Controller
51
A0 External Protection Device Abnormality
51
A1 PCB Abnormality
53
A3 Drain Level Control System (S1L) Abnormality
54
A6 Fan Motor (M1F) Lock, Overload
57
A6 Indoor Unit Fan Motor Abnormality
60
A6 Overload/Overcurrent/Lock of Indoor Unit Fan Motor
62
A7 Swing Flap Motor (M1S) Abnormality
68
A8 Power Supply Voltage Abnormality
71
A9 Electronic Expansion Valve Coil Abnormality / Dust Clogging
73
AF Drain Level above Limit
76
AJ Capacity Determination Device Abnormality
78
C1 Transmission Error (between Indoor Unit PCB and Fan PCB)
80
C4 Thermistor for Liquid Pipe Abnormality
83
C5 Thermistor for Gas Pipe Abnormality
85
C6 Combination Abnormality (between Indoor Unit PCB and Fan PCB)
87
C9 Thermistor for Suction Air Abnormality
89
CA Thermistor for Discharge Air Abnormality
91
CC Humidity Sensor System Abnormality
93
CJ Room Temperature Thermistor in Remote Controller Abnormality
95
E1 PCB Abnormality
97
E2 Earth Leakage by Leak Detection PCB Assy
99
E3 Actuation of High Pressure Sensor
102
E3 Abnormal Discharge Pressure
104
E4 Actuation of Low Pressure Sensor
107
E4 Abnormal Suction Pressure
109
E5 Inverter Compressor Motor Lock
112
E6 STD Compressor Motor Overcurrent/Lock
120
E7 Outdoor Unit Fan Motor Abnormality
122
E9 Electronic Expansion Valve Coil Abnormality
135
F3 Abnormal Discharge Pipe Temperature
141
F6 Refrigerant Overcharged
148
H3 High Pressure Switch System Abnormality
153
H7 Outdoor Unit Fan Motor Signal Abnormality
155
H9 Outdoor Air Thermistor Abnormality
160
HJ Water System Error
164
J1 High Pressure Sensor Abnormality
167
J2 Current Sensor Abnormality
170
Compressor Operation
172
J3 Discharge Pipe Thermistor Abnormality
173
J4 Heat Exchanger Gas Pipe Thermistor Abnormality
175
J5 Suction Pipe Thermistor Abnormality
177
J6 Outdoor Unit Heat Exchanger Thermistor Abnormality
179
J7 Liquid Pipe Thermistor Abnormality
181
J8 Thermistor System Abnormality
183
J9 Subcooling Heat Exchanger Gas Pipe Thermistor Abnormality
185
JA High Pressure Sensor Abnormality
187
JA Discharge Pipe Pressure Sensor Abnormality
190
JC Low Pressure Sensor Abnormality
193
JC Suction Pipe Pressure Sensor Abnormality
196
L1 Inverter PCB Abnormality
199
L4 Inverter Radiation Fin Temperature Rise Abnormality
207
L5 Momentary Overcurrent of Inverter Compressor
212
L8 Momentary Overcurrent of Inverter Compressor
218
Output Current Check
219
L9 Inverter Compressor Startup Failure
224
LC Transmission Error between Inverter and Control PCB
231
P1 Inverter Over-Ripple Protection
239
P4 Inverter Radiation Fin Thermistor Abnormality
244
PJ Field Setting Abnormality after Replacing Main PCB or Combination of PCB Abnormality
248
U0 Refrigerant Shortage Alert
255
U1 Reverse Phase, Open Phase
264
U2 Power Supply Insufficient or Instantaneous Error
266
U3 Check Operation Is Not Executed
288
U4 Transmission Error between Indoor Units and Outdoor Units
290
U5 Transmission Error between Remote Controller and Indoor Unit
303
U7 Transmission Error (Across Outdoor Units)
305
U8 Transmission Error between Main and Sub Remote Controllers
319
U9 Transmission Error between Indoor and Outdoor Units in the same System
321
UA Improper Combination of Indoor and Outdoor Units, Indoor Units and Remote Controller
326
UC Address Duplication of Centralized Remote Controller
340
UE Transmission Error between Centralized Remote Controller and Indoor Unit
341
UF System Is Not Set yet
346
UH System Abnormality, Refrigerant System Address Undefined
348
Check for Causes of Rise in High Pressure
351
Check for Causes of Drop in Low Pressure
353
Check the Factors of Overheat Operation
356
Power Transistor Check
359
PCB and Circuit Diagram
361
Check for Causes of Wet Operation
362
Check for Overcharge of Refrigerant
364
Diagnosis of Overcharge of Refrigerant
364
Check for Shortage of Refrigerant
366
Diagnosis of Shortage of Refrigerant
366
Vacuuming and Dehydration Procedure
368
Normal Vacuuming and Dehydration
368
Vacuuming and Dehydration
368
Leaving in Vacuum State
368
Special Vacuuming and Dehydration
369
Vacuum Break
369
List of Inverter-Related Error Codes
370
Concept of Inverter-Related Error Codes
372
Thermistor Resistance / Temperature Characteristics
374
For Radiation Fin Thermistor
374
Pressure Sensor
377
Broken Wire Check of the Connecting Wires
378
Master Unit Centralized Connector Setting Table
380
Master-Slave Unit Setting Table
382
Check on Connector of Fan Motor
383
4
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Daikin VRVII Specifications
General
Brand
Daikin
Model
VRVII
Category
Air Conditioner
Language
English
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