J3-47-49-51 - Compressor Body Thermistor R8T Open Circuit; J3-48-50-52 - Compressor Body Thermistor R8T Short Circuit; J3-56-57-58 - High Discharge Temperature - Daikin VRV IV+ Service Manual

2 Troubleshooting
1 Perform a check of the compressor body thermistors. See
"3.17 Thermistors" on page 128.
Possible cause: Faulty compressor body thermistor or
connector fault.
2 Perform a check of the main PCB. See
page 106.
Possible cause: Faulty main PCB.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.45 J3-47-49-51 – Compressor body
thermistor R8T open circuit
Main error code Sub error code
J3 47
49
51
INFORMATION
Main, Sub 1 and Sub 2 indications are relevant in multiple
outdoor unit configurations. Main outdoor unit is the unit to
which F1‑F2 IN transmission line is connected. Main, Sub
1 and Sub 2 outdoor units can be identified by field setting
1‑00.
Trigger Effect
Compressor (M1C) Unit will stop
body temperature operating.
thermistor R8T open
circuit or out of range.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1 Perform a check of the compressor body thermistors. See
"3.17 Thermistors" on page 128.
Possible cause: Faulty compressor body thermistor or
connector fault.
2 Perform a check of the main PCB. See
page 106.
Possible cause: Faulty main PCB.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.46 J3-48-50-52 – Compressor body
thermistor R8T short circuit
Main error code Sub error code
J3 48
50
52
INFORMATION
Main, Sub 1 and Sub 2 indications are relevant in multiple
outdoor unit configurations. Main outdoor unit is the unit to
which F1‑F2 IN transmission line is connected. Main, Sub
1 and Sub 2 outdoor units can be identified by field setting
1‑00.
Service manual
30
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"3.9 Main PCB" on
Unit
Main
Sub 1
Sub 2
Reset
Manual reset via user
interface.
Automatic reset when
thermistor read-out is
within range.
"3.9 Main PCB" on
Unit
Main
Sub 1
Sub 2
Trigger Effect
Compressor (M1C) Unit will stop
body temperature operating.
thermistor R8T short
circuit or out of range.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1 Perform a check of the compressor body thermistors. See
"3.17 Thermistors" on page 128.
Possible cause: Faulty compressor body thermistor or
connector fault.
2 Perform a check of the main PCB. See
page 106.
Possible cause: Faulty main PCB.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.47 J3-56-57-58 – High discharge temperature
Main error code Sub error code
J3 56
57
58
INFORMATION
Main, Sub 1 and Sub 2 indications are relevant in multiple
outdoor unit configurations. Main outdoor unit is the unit to
which F1‑F2 IN transmission line is connected. Main, Sub
1 and Sub 2 outdoor units can be identified by field setting
1‑00.
Trigger Effect
Compressor Unit keeps running.
discharge
temperature (R21T
and/or R22T) too
high.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1 Perform a check of the discharge pipe thermistor. See
"3.17 Thermistors" on page 128.
Possible cause: Faulty discharge pipe thermistor or
connector fault.
2 Perform a check of the main expansion valve. See
"3.5 Expansion valve" on page 89.
Possible cause: Faulty main expansion valve.
3 Perform a check of the subcool expansion valve. See
"3.5 Expansion valve" on page 89.
Possible cause: Faulty subcool expansion valve.
4 Perform a check of the expansion valve(s) of the indoor unit(s).
See service manual of the respective indoor unit(s) for more
information.
Possible cause: Faulty indoor unit expansion valve.
Reset
Manual reset via user
interface.
Automatic reset when
thermistor read-out is
within range.
"3.9 Main PCB" on
Unit
Main
Sub 1
Sub 2
Reset
Auto reset.
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07