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Troubleshooting
Service manual
45
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05
4
Perform a check of the refrigerant low pressure sensor. See
Possible cause:
Faulty refrigerant low pressure sensor.
5
Check if the refrigerant circuit is correctly charged. See
Possible cause:
Refrigerant overcharge.
6
Check if the power supply is conform with the regulations. See
Possible cause:
▪
Faulty or disturbance of the power supply (imbalance >10%),
▪
Power drop,
▪
Short circuit.
7
Perform a power reset. If the error disappears and is raised again after a
while, check for the presence of an external source causing electrical noise.
See
Possible cause:
External source may cause interference.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
2.3.25 E9-04-07-10 – Electronic expansion valve Y3E abnormality
Main error code
Sub error code
Unit
E9
04
Main
07
Sub 1
10
Sub 2
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
Reset
Lower heat exchanger
expansion valve Y3E
malfunction.
Unit will stop operating.
Power reset at outdoor
unit.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
INFORMATION
When the power is switched ON, the outdoor unit main PCB checks all expansion
valve coil windings by current check.
1
Perform a check of the main PCB. See
290].
Summary of Contents for VRV IV+
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