HRX-OM-Q026
Chapter 6 Alarm Notification and Troubleshooting
6.3 Troubleshooting HRSH Series
6-6
Table 6-2 Alarm codes and troubleshooting (2/3)
Alarm
operation
(Default)
Cause / Remedy
(Press the reset key after eliminating the
cause.)
Controller failure.
Ask for service for the controller.
Fuse for the power supply output of the
contact input/output connector has blown.
･Ask for service for the fuse of the output
voltage circuit.
･Check that there is no incorrect wiring and
the current load is within the specified range.
Circulating fluid
discharge temp. sensor
failure
Short-circuit or broken wire of the temperature
sensor.
Ask for service for the temperature sensor.
Circulating fluid return
temp. sensor failure
Compressor intake
temp. sensor failure
Circulating fluid
discharge pressure
sensor failure
Short-circuit or broken wire of the pressure
sensor of the circulating fluid circuit. EEEE is
displayed on the PI display of the main
display and check monitor display.
Ask for service for the pressure sensor.
Compressor discharge
pressure sensor failure
Short-circuit or broken wire of the pressure
sensor of the refrigerant circuit. Ask for
service for the pressure sensor.
Compressor intake
pressure sensor failure
Notices of the periodical
maintenances.
Ask for services of the pump,
fan and/or compressor.
Reset the operation
cumulated time for each
alarm with the menu
, , or
after having the
service.
Contact input 1 signal
detection
Contact input has been detected.
Contact input 2 signal
detection
Compressor discharge
temp. sensor failure
Short-circuit or broken wire of the temperature
sensor. Ask for service for the temperature
sensor.
Compressor discharge
temp. rise
Check that the ambient temperature, facility
water, and heat load satisfy the specifications.
Internal unit fan
stoppage
Internal unit fan failure. Ask for service for the
internal unit fan.
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