PMML0175A-rev.1 - 6/2008
HARC-MODBUS - xxxxxxxxxxxxxxxxxx
18
HARC-MODBUS - Installation Manual
7. Troubleshooting
Nº
Alarm Code
Description
Countermeasure
1
Indoor Units have not communicated
with HARC-MODBUS for more than
10 min.
1. Ensure that H-LINK connection is correctly done
in HARC (K1) and also Indoor Units.
2. Ensure that Power are supplied to Air Conditioners.
2
Indoor Units have never
communicated with HARC-MODBUS
1. Ensure that H-LINK connection is correctly done
in HARC (K1) and also in Indoor Units.
2. Ensure that Power are supplied to Air Conditioners.
3
D7 is always OFF
No LED is flickering on PCB and
7 segments are OFF
1. Ensure that 230 are supplied to Power Source.
2. Ensure that +5V DC is supplied to K3.
Notes:
- Power source output DC signal has a rotary switch
that must be correctly set to get +5V DC.
- D7 must be in ON.
4
D12 is never flickering
HARC-MODBUS is not reading/
sending data (D12 is never flickering)
1. Check connection between MODBUS devices
and K5.
5
D12 is not flickering
HARC is not operating
(D13 is not flickering)
1. Check SW3 is in RUN position. If no, set RUN
and push reset.
6
D4 & D11 are not
flickering
There is no H-LINK communication
from HARC-MODBUS
1. D4 is flickering but D11 is not flickering.
See line Nº6, countermeasure 1.
2. D4 neither D11 are not flickering.
See line Nº3, countermeasure 1.
Summary of Contents for HARC-MODBUS
Page 3: ......