8 Alarm Management
Alarms in PolyCool470.10 are divided into two groups: auto reset alarms and manual
reset alarms.
• For an auto reset alarm, users are not required to acknowledge and reset it. The
corresponding device will be automatically restarted once the alarm status
disappears.
• Once a manual reset alarm is detected, the system will be stopped. Users need
acknowledge and reset it, and also manually restart the corresponding device after
the fault status is cleared.
When an alarm is detected, the corresponding device icon (if any) and the icon will
continuously flash. An alarm code will be displayed on the screen.
• If more than one alarm is detected, the alarm codes will be displayed successively on
the LCD screen until the alarm status disappears, or until they are manually
acknowledged or reset (only for manual reset alarms).
• If the system detects warnings and alarms at the same time, the warning codes will
NOT be displayed on the LCD.
• The latest 20 normal alarms and manual reset alarms generated in total are
separately kept under the auto reset alarm (AR) and manual reset alarm (MR)
categories in the menu.
Auto Reset Alarms
The following are codes for auto reset alarms with their meanings.
Codes Meaning
AL01 Compressor low pressure (DI2)
AL02 Compressor high pressure (DI3)
AL03 Low inside supply water temperature protection (when less than AL01 in cooling mode)
AL04 Low outside supply water temperature protection (when less than AL01 in heating mode)
AL05 Inside supply temperature is over the high limit in heating mode(when over than AL03 in
heating mode)
Manual Reset Alarms
The following are codes for manual reset alarms with their meanings.
Codes Meaning
AL11 Inside return temperature sensor(X1)
AL12 Inside supply temperature sensor(X2)
AL13 Outside temperature sensor(X3)
AL14 Domestic hot water temperature sensor(X4)
AL15 Outside supply temperature sensor(X5)
AL16 Outside return temperature sensor(X6)
AL17 Flow switch alarm after the delay(AL05)
AL18 Alarm number of compressor low pressure within 24 hours is over the limit(AL06)
AL19 Alarm number of compressor high pressure within 24 hours is over the limit(AL07)
AL20 Low evaporator temperature protection(AL08)
15/28
Siemens Building Technologies SIEMENS Controller HEAT PUMP controller
HVAC Products 27.11.2006
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