Heiko Thermal 12, Руководство пользователя

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4. Usage
D. Warning
When the unit is having a protection or failure, a symbol will be shown on the display. Please enters
into "Info" menu to check the protection or failure codes.
Some information, protections and failures that are more likely to happen, will shown in front page so
the customer can see it easier:
Yellow —— Outdoor unit protection or failure
Red —— System protection or failure
1. Coil Temp. too low
This is indoor coil temperature too low. This happens in cooling operation of the unit. Too low coil
temperature may make the water freeze up inside plate heat exchanger and cause damage. Compressor
speed down if coil temp. lower than 2
℃; Compressor stops if coil Temp. lower than -1 ℃; Compressor
restarts if coil Temp. higher than 6 ℃. When this happens, please :
A. Check whether set temperature for cooling is too low; whether system has too small water flow rate;
check water system especially the filter .
B. Check whether system has not enough refrigerant inside by measuring the evaporating pressure .
C. Check whether ambient temperature is lower than 15 ℃.
2. Water flow rate too small
System water flow rate is less than minimum allowable flow rate. Check the water system, especially the
filter; check the working statue of water pump.
3. Water flow switch failure
Water flow switch should be in open mode when unit circulation pump is working. If not, the unit think
the flow switch itself is broken. Check whether flow switch is broken or not well connected. Check
whether there has another pump that circulates the water through the unit, when unit circulation pump is
working.
4. Communication Failure!
Communication failure shown here means the communication between operation panel, indoor PCB and
outdoor PCB have been set up, but communication data lost too much. Check whether communication
cable is longer than 30M; whether there has a source of the disturbance nearby the unit. Unit recovers
when communication recovers.
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