Daikin REYQ8-48PY1B, Руководство по обслуживанию

Страница: 351 / 477

SiBE37-701_B Troubleshooting by Indication on the Remote Controller
Troubleshooting 340
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
∗
1 : Referring to the information on P386.
Check 6
NO
Replace the low pressure
sensor.
Check if the low
pressure is
0.1MPa or below.
(
∗
1)
In cooling mode
(1) Set up a pressure gauge at the service port on the low
pressure side.
(2) Reset the operation using the remote controller then restart.
Check if the
property of low
pressure sensor is
normal. (
∗
2)
NO
YES
YES
Replace the main PCB
(A1P).
Remove the factor of
decreasing low pressure by
referring to .
Check 6
∗
1
∗
1: Check the low pressure value by using pressure gauge in operation.
∗
2: Compare the actual measurement value by pressure sensor with the
value by the pressure gauge.
(To gain actual measurement value by pressure sensor, measure the
voltage at the connector [between (2)-(3)] and then convert the value
into pressure referring to P452.)
In heating mode
Reset the operation using the remote controller then restart.
NO
Replace the thermistor.
Check if the temperature
difference between the suction
pipe and the heat exchanger is
20 °C and over.
Check if the property of suction
pipe thermistor (A7T) and heat
exchanger thermistor (R4T) are
normal. (*3)
NO
YES
Replace the main PCB.
• With individual systems,
replace the control PCB 1
(A1P) or the control PCB 3
(A3P).
• With multi systems, replace
the main PCB (A1P).
Remove the factor of
superheating by referring to
.
Check 3
∗
2
∗
2 : Referring to the information on P383. Check 3
∗
3: Compare the thermistor resistance value with the value on the surface
thermometer.