SMC Networks HRSH100-A 20 Series - Page 162

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)
Code
Alarm name
Alarm
operation
(Default)
Cause / Remedy
(Press the reset key after eliminating the
cause.)
AL20
Memory error
A.STP
Controller failure.
Ask for service for the controller.
AL21
DC line fuse cut
A.STP
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.
AL22
Circulating fluid
discharge temp. sensor
failure
A.STP
Short-circuit or broken wire of the
temperature sensor.
Ask for service for the temperature sensor.
AL23
Circulating fluid return
temp. sensor failure
A.STP
AL24
Compressor intake
temp. sensor failure
P.RUN
AL25
Circulating fluid
discharge pressure
sensor failure
A.STP
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.
AL26
Compressor discharge
pressure sensor failure
P.RUN
Short-circuit or broken wire of the pressure
sensor of the refrigerant circuit. Ask for
service for the pressure sensor.
AL27
Compressor intake
pressure sensor failure
P.RUN
AL28
Pump maintenance
OFF
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.
Every 20,000
hours
AL29
2
Fan maintenance
OFF
Every 30,000
ours
AL30
Compressor
maintenance
OFF
Every 30,000
hours
AL31
Contact input 1 signal
detection
A.STP
Contact input has been detected.
AL32
Contact input 2 signal
detection
A.STP
AL37
Compressor discharge
temp. sensor failure
P.RUN
Short-circuit or broken wire of the
temperature sensor. Ask for service for the
temperature sensor.
AL38
Compressor discharge
temp. rise
P.RUN
Check that the ambient temperature, facility
water, and heat load satisfy the
specifications.
AL39
Internal unit fan
stoppage
A.RUN
Internal unit fan failure. Ask for service for the
internal unit fan.