Daikin VRV IV+ Service Manual page 91

2.3.72 J8-01-02-03 – Upper heat exchanger liquid temperature thermistor R4T abnormality
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05
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
Refrigerant liquid
thermistor R7T after
subcool heat exchanger
short/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 refrigerant liquid thermistor of the subcool heat
exchanger. See "3.21 Thermistors" [
Possible cause: Faulty refrigerant liquid thermistor of the subcool heat
exchanger or connector fault.
2 Perform a check of the main PCB. See
Possible cause: Faulty main PCB.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
Main error code
J8
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
Upper heat exchanger
liquid temperature
thermistor R4T short/
open circuit or out of
range.
Effect
Unit will stop operating.
4
348].
"3.11 Main
Sub error code
01
02
03
Effect
Unit will stop operating.
2 Troubleshooting
|
Reset
Manual reset via user
interface.
Automatic reset when
thermistor read-out is
within range.
4
PCB" [ 290].
Unit
Main
Sub 1
Sub 2
Reset
Manual reset via user
interface.
Automatic reset when
thermistor read-out is
within range.
Service manual
91