Sinclair ASH-12AIE2 - Analysis or Processing of some of the Malfunction Display

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Installation and Maintenance
Service Manual
Analysis or processing of some of the malfunction display:
1. Compressor discharge protection
Possible causes: shortage of refrigerant; blockage of air filter; poor ventilation or air flow short pass for condenser; the system
has noncondensing gas (such as air, water etc.); blockage of capillary assy (including lter); leakage inside four-way valve causes
incorrect operation; malfunction of compressor; malfunction of protection relay; malfunction of discharge sensor; outdoor temperature
too high.
Processing method: refer to the malfunction analysis in the above section.
2. Low voltage overcurrent protection
Possible cause: Sudden drop of supply voltage.
3. Communication malfunction
Processing method: Check if communication signal cable is connected reliably.
4. Sensor open or short circuit
Processing method: Check whether sensor is normal, connected with the corre sponding position on the controller and if damage of
lead wire is found.
5. Compressor over load protection
Possible causes: insufficient or too much refrigrant; blockage of capillary and increase of suction temp.; improper running of
compressor, burning in or stuck of bearing, damage of discharge valve; malfunction of protector.
Processing method: adjust refrigerant amount; replace the capillary; replace the compressor; use universal meter to check if the
contactor of compress or is ne when it is not over heated, if not replace the protector.
6. System malfunction
i.e.overload protection.When tube temperature(Check the temperature of outdoor heat exchanger when cooling and check the
temperatur e of indoor heat exchanger when heating) is too high, protection will be activated.
Possi ble causes: Outdoor temperature is too high when cooling; insufcient outdoor air circulation; refrigerant ow malfunction.
please refer to the malfunction analysis in the previous section for handling method .
7. IPM module protection
Processing method:Once the module malfunction happens,if it persists for a long time and can not be selfcanceled, cut off the power
and turn off the unit,and then re-energize the unit again after about 10 min.After repeating the procedure for sever times, if the
malfunction still exists,replace the module.