Alarm Code List For Chiller; Chiller Alarms Code List - Hitachi HARC-MODBUS Installation And Operation Manual

HARC-MODBUS - Installation Manual
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6.3 Alarm code list for CHILLER

6.3.1

CHILLER alarms code list

CHILLER alarm
Description
7SEG1 7SEG2
Failure of Water Inlet Temperature Thermistor
Failure of Water Outlet Temperature Thermistor
(only for single cycle unit)
Failure of Ambient Temperature Thermistor (open/short)
" "
No Feedback Signal from Water Pump
Activation of Freeze Protection Control (only for single cycle unit)
Alarm of Water Failure (Differential Pressure Switch
or Flow Switch Option)-Condenser
Alarm of Water Failure (Differential Pressure Switch
or Flow Switch Option)-Evaporator
Activation of Thermostat for excessively High Water Temperature
(Only single cycle units)
" "
Activation of additional protection device
Phase Abnormally
" "
Error Communication between Control PCB (PCB
Error communication between Chiller and Remote Controller (H-LINK)
$ $
Error Communication between Expansion Valve PCB and Control PCB
Incorrect Operation
, PCB )
C1 C2
H-LINK
Code
20
21
24
26
27
28
29
30
31
32
33
34
36
40~45,
47,47,54
PMML0175A-rev.1 - 6/2008