Daikin VRV S RXMQ10ARY1, Service Manual

Page: 245 / 377

SiAF332111E Troubleshooting by Error Code
Part 6 Service Diagnosis 239
5.28 Compressor Damage Alarm
Applicable
Models
RXMQ10/12AR
Error Code
E6
Method of Error
Detection
Error is determined based on the detected compressor revolutions, pressure values of the
high/low pressure sensors, and theoretical compressor current value. This theoretical current
value is compared to the actual value detected by the power transistor.
Error Decision
Conditions
The actual current value of the compressor is abnormally high (130% the theoretical current
value or higher) for a continuous period of 30 minutes.
Supposed
Causes
 Defective compressor
 Defective high pressure sensor
 Defective low pressure sensor
 Defective outdoor unit main PCB
 Defective inverter PCB
Troubleshooting
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
1. Mount a pressure gauge on the high and low pressure service ports.
2. Reset the power supply, and then restart operation.
Replace the high
pressure sensor
(S1NPH).
Replace the low
pressure sensor.
(S1NPL)
CHECK 12
Are the characteristics
of the high pressure sensor
normal?
Compare the voltage
measurement of the connector
of the pressure sensor ( 1)
with the measurement
of the pressure
gauge.
NO
YES
CHECK 12
Are the characteristics
of the low pressure sensor
normal?
Compare the voltage measurement
of the connector of the pressure
sensor ( 1) with the
measurement
of the pressure
gauge.
NO
YES
CHECK 12
Service Checker
Connect the service checker to compare the high/low pressure measured
by the service checker and the actual measured voltage values
of the high/low pressure sensors.
A
Go to the next page.
( 1) Use the table on CHECK 12
to convert the voltage measurement
into pressure measurement.