Daikin VRV IV+ Service Manual page 24

2 | Troubleshooting
2.3.5 E2-06-07-08 – Open circuit on earth leakage detection core
Service manual
24
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
Main PCB detects earth
leakage through current
sensor >safety value, see
"6.6 Safety
4
devices" [ 449].
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Perform a check of the current sensor. See
Possible cause: Faulty current sensor.
2 Check if the power supply is conform with the regulations. See
4
circuit" [ 356].
Possible cause:
▪ Faulty or disturbance of the power supply (imbalance >10%),
▪ Power drop,
▪ Short circuit.
3 Perform a check of the main PCB. See
Possible cause: Faulty main PCB.
4 Using a megger device, check the solenoid valve coils, 4‑way valve coil, fan
motors and compressors if any earth leakage is found. Replace the
component(s) that generate earth leakage.
5 Check if the refrigerant circuit is correctly charged. See
4
circuit" [ 363].
Possible cause: Refrigerant overcharge.
6 Check for the presence of humidity in the refrigerant circuit. See
"4.2 Refrigerant circuit" [
Possible cause: Humidity in the refrigerant circuit.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
Main error code
E2
Effect
Unit will stop operating.
"3.5 Current
"3.11 Main
4
363].
Sub error code
06
07
08
Reset
Manual reset via user
interface.
4
sensor" [ 237].
"4.1 Electrical
4
PCB" [ 290].
"4.2 Refrigerant
Unit
Main
Sub 1
Sub 2
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05