HRX-OM-R016
Chapter 7 Alarm indication and trouble shooting
7.4
Other Errors
HRS Series
7-6
Table 7-2 Alarm code list and Troubleshooting (2/2)
Code
Descriptioin
Operation
Cause / Remedy
(Press the reset key after eliminating the cause.)
AL28
Maintenance of pump
Continued
The timing of a periodical check is
informed.
Recommended to ask for the
check and service of the pump,
fan motor and compressor.
*Refer to’’5.18 Accumulated time
reset function
’’.
Every 20,000 hours
(Option T: Every
8,000 hours)
AL29
3
Maintenance of fan motor
3
Continued
Every 20,000 hours
AL30
Maintenance of compressor
Continued
Every 50,000 hours
AL31
4
Contact
input1
signal
detection
4
Stop
1
Contact input is detected.
AL32
Contact
input
2
signal
detection
AL33
Water leakage
Stop
1
・
Check if the leakage sensor is connected.
・
Leakage occurred. Check the leakage point.
AL34
Electric
resistivity/conductivity rise
Continued
Electric resistivity/conductivity is larger than the set value.
If an electric conductivity sensor is used, replace the DI
filter.
AL35
Electric
resistivity/conductivity drop
Continued
Electric resistivity/conductivity is smaller than the set value.
If an electric resistivity sensor is used, replace the DI filter.
AL36
Electric
resistivity/conductivity
sensor error
Continued
・
Check if the resistivity/conductivity sensor is connected.
・
There may be short circuit or open wire of the resistivity
/conductivity sensor. Replace the sensor.
1
:
’’Stop” or “Continued” are default settings. The user can change them to “Continued” and “Stop”. For details, refer
to
’’5.16 Alarm customize function’’.
2
:”AL19, Communication error” is disabled in the default setting. When this function needs to be enabled, refer
to ’’5.19 Communication function’’.
3: For air-cooled type.
4
:
The functions of “AL31 Contact input 1 Signal detection” and “AL32 Contact input 2 Signal detection” are not
default settings.
If these functions are used, refer to “5.19Communication function”.
5: Notice on mechanical seal replacement. Mechanical seal replacement is limited to 2 times. If the cumulative
operation time of the pump exceeds 20,000 hours, please consider requesting pump inspection service.
7.4 Other Errors
How to check other errors
The causes and remedies for failures that are not indicated by alarm
numbers are shown in
’’.
Table 7-3 Causes and remedies for failures without alarm number
Content of failure
Cause
Remedy
The operation panel
displays nothing
The power supply switch is not turned
on.
Turn on the power supply switch.
Failure of power supply switch.
Replace the power supply switch.
No power supply
(The breaker for the power supply is
not turned on.)
Supply the power.
Trip of breaker due to short-circuit and
current leakage.
Repair the short-circuit or current leaking
part.
The [RUN] LED does not
light up even when the
[RUN/STOP] switch is
pressed.
Communication is set.
Check the presence of communication
setting.
Failure of the [RUN] LED
Replace the controller.
Failure of the [RUN/STOP] switch
Replace the controller.