MCAC-2008-11 Air-cooled Modular Chiller
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11. Troubleshooting
11.1 Failure & Protection Codes of the Module
Code Trouble
E0
Water-flow check trouble(wire controller and control board must be restarted when the trouble is displayed for
the third time)
E1 Power phases sequence failure
E2 Communication failure
E3 Total outlet water Temperature sensor failure (available for main unit)
E4 Plate heat exchanger outlet water Temperature sensor failure
E5 Condenser A tube Temperature sensor failure
E6 Condenser B tube Temperature sensor failure
E7 Outdoor Temperature sensor failure
E8 System A compressor discharge gas Temperature sensor failure
E9
Water-flow check trouble(wire controller and control board can recover automatically when the trouble is
displayed for the first and second times
EA The number of auxiliary unit checked by main unit decrease(only for wire controller)
EB Prevent frostbite Temp. sensor of plate heat-exchanger A trouble
EC Wire controller can not search the modules on line
ED Data communication between wire controller and modules failure(only for wire controller)
EE Communication between wire controller and computer failure(only for wire controller)
EF Prevent frostbite Temp. sensor of plate heat-exchanger B trouble
P0 System A high-pressure protection or discharge gas Temperature protection
P1 System A low-pressure protection
P2 System B high-pressure protection or discharge gas Temperature protection
P3 System B low-pressure protection
P4 System A current protection
P5 System B current protection
P6 System A Condenser high-Temperature protection
P7 System B Condenser high-Temperature protection
P8 Digital compressor discharge Temperature protection, when it is above 125℃
Pb System anti-freeze protection
PC Gas discharge Temp. of digital compressor above 125℃ protection(only for wire controller)
PE Low-temperature protection of plate heat-exchanger
11.2 Troubles and Solutions
Troubles Possible reasons Solutions
Air or other gas enter the system
Discharge the gas from refrigerant
charging hole, re-vacuuming if
necessary
Fins are dirty or jammed by some
obstacles
Splash the fins of condenser
The condenser wind flow is insufficient
or motor fail
Check the condenser motor, repair it if
necessary
High discharge pressure
(Cooling)
High suction pressure
Refer to the “high suction pressure”
part.
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