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MC Failure history screen
* Refer to the list of failure codes for details of the failure codes
and their content.
[How to clear failure history]
• Press
to display the confirmation screen.
• Refer to "When confirming on the message screen" when
using the confirmation screen.
Information/Operation screen
• Use the cursor to select an item.
Refer to the table below for the items and content of display
information.
Table - MC error codes
Error codes
(Hexadecimal)
Item
Description
UC
display
Circuit
display
Process
02
Pump interlock
No pump interlock input during operation
0
0
Relevant system stops
1A
HumanIF comm error
Module controller’s Human IF communication
error
0
0
Operation continues
1C
GC communication
err
Communication error (in Remote mode)
between module controller and group
controller
0
0
Operation continues
1D
MC communication
err
Communication error between module
controllers (in Remote mode)
0
0
Operation continues with backup (steps) control
E0
Load side RWT error
0
0
E1
Load side SWT error
0
0
E2
Load side Flow meter
0
0
When return water and supply water sensors
exist and are normal:
Operation continues
When return water and supply water sensors do
not exist and are not normal:
Backup operation
E3
Ext diff prss sensor
0
0
Backup operation
When flow meter exists and is normal:
Operation continue
When flow meter does not exist or is not normal:
Operation continue with backup control
In case of thermistor sensor
Sensor disconnection, short circuit
In case of voltage input
In case of voltage judged to be error in
analogue input voltage range setting
In case of voltage judged to be error in
analogue input range setting
Date and
Time
Indicates the date and time of occurrence. (The year is the
last 2 digits of the Western calendar year)
Code
Displays a 5-digit code. The left 2 digits indicate the UC
number and the right 3 digits indicate the failure code.
Content
Displays the failure content. (Up to 16 latest items can be
displayed.)
Item Description
System info
You can check the operation data for each
system.
UC info
You can check the operation data for each
UC.
Crcit info
You can check the operation data for each
circuit in each UC.
UC ope
You can operate each system of each UC.
Operate solenoid valve for
spray
You can turn ON/OFF the solenoid valve for
evaporative condenser for each system.