Table of Contents
Advertisement
Main code
Master
RXMLQ8 + RXYLQ10~14T7Y1B*
VRV IV system air conditioner
4P543427-1A – 2020.10
Sub code
Slave 1
Slave 2
Cause
Low pressure sensor
malfunction (S1NPL): open
circuit - A1P (X31A)
Low pressure sensor
malfunction (S1NPL): short
circuit - A1P (X31A)
Transmission outdoor unit -
inverter: INV1 transmission
trouble - A1P (X20A, X28A,
X40A)
Transmission outdoor unit -
inverter: FAN1 transmission
trouble - A1P (X20A, X28A,
X40A)
Transmission outdoor unit -
inverter: FAN2 transmission
trouble - A1P (X20A, X28A,
X40A)
Transmission outdoor unit -
inverter: INV2 transmission
trouble - A1P (X20A, X28A,
X40A)
INV1 unbalanced power
supply voltage
INV2 unbalanced power
supply voltage
Reversed power supply phase
malfunction
Reversed power supply phase
malfunction
INV1 voltage power shortage
INV1 power phase loss
INV2 voltage power shortage
INV2 power phase loss
Warning indication: Leak
detection or refrigerant
amount check not performed
(system operation possible)
Malfunction code: System test
run not yet executed (system
operation not possible)
24
Troubleshooting
|
Solution
Check connection on PCB or
actuator.
Check connection on PCB or
actuator.
Check connection.
Check connection.
Check connection.
Check connection.
Check if power supply is
within range.
Check if power supply is
within range.
Correct phase order.
Correct phase order.
Check if power supply is
within range.
Check if power supply is
within range.
Check if power supply is
within range
Check if power supply is
within range.
Execute autocharge function
(see manual); unit not ready
for leak detection
functionality.
Execute system test run.
Installer and user reference guide
145
- Quick Links:
- Error Codes: Overview
Hide quick links:
Advertisement
Table of Contents
Troubleshooting
Need help?
Do you have a question about the VRV IV and is the answer not in the manual?
Questions and answers
Hi, kindly assist me with resolving the problem of the VRV IV series. It pops up from the remote control, and after checking the master and the slaves, both cannot identify their ID number. though the last error was e2. Someone messed up with the wiring, perhaps the communication cable. If we can see what cable goes to the first unit from the master, we have 16 units attached.
The troubleshooting steps for a Daikin VRV IV series system with an E2 error and communication issues between the master and slave units are:
1. Check Q1/Q2 Wiring: Inspect the wiring connections between the master and slave units at the Q1/Q2 terminals. Faulty or incorrect wiring can cause communication failures.
2. Verify Indoor-Outdoor Wiring: Ensure that the wiring between the indoor and outdoor units is correctly connected at the Q1/Q2 and F1/F2 terminals. Incorrect connections can lead to system malfunctions.
3. Check System Test Run: If the system test run was not executed or ended abnormally, perform the test run again to identify potential issues.
4. Confirm Indoor Unit Configuration: Ensure that the number of indoor units connected to the F1/F2 line does not exceed the system's capacity. Too many units can cause communication failures.
5. Inspect System Compatibility: Verify that the indoor units connected are compatible with the system (e.g., R410A, R407C, Hydrobox). Mixing incompatible units may cause communication issues.
6. Examine Outdoor Unit Wiring: Ensure that the interconnecting wiring between outdoor units in the same piping system is connected to the Q1/Q2 (Out Multi) terminals. Incorrect wiring to the F1/F2 terminals can cause system malfunctions.
Following these steps should help diagnose and resolve communication issues in the VRV IV system.
This answer is automatically generated