Daikin VRV IV+ Service Manual page 27

2.3.7 E3-02-04-06 – High pressure error
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
Main error code
E3
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
High pressure control (by
sensor) active due to
pressure >safety value
certain times within
certain minutes, 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 Check that all stop valves of the refrigerant circuit are open. See
"4.2 Refrigerant circuit" [
Possible cause: Closed stop valve in the refrigerant circuit.
2 Check the required space around the outdoor unit heat exchanger. See
"4.3 External factors" [
Possible cause: Insufficient air flow or air by‑pass due to required space
specifications not met.
3 Clean the outdoor heat exchanger. See "5 Maintenance" [
Possible cause: Dirty outdoor heat exchanger.
4 Perform a check of the refrigerant high pressure sensor. See
high pressure sensor" [
Possible cause: Faulty refrigerant high pressure sensor.
5 Check if the refrigerant circuit is correctly charged. See
4
circuit" [ 363].
Sub error code
02
04
06
Effect
Unit will stop operating.
4
363].
4
372].
4
330].
2 Troubleshooting
|
Unit
Main
Sub 1
Sub 2
Reset
If field setting 2-15=1
(default): Via the indoor
unit remote controller,
cycle OFF & ON.
If field setting 2-15=0:
Press BS3 on main PCB on
outdoor unit, and then via
indoor unit remote
controller, cycle OFF &
ON.
4
374].
"3.17 Refrigerant
"4.2 Refrigerant
Service manual
27