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.
Содержание HARC-MODBUS
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