
5.1 Error Indications and Trouble Shooting
In case of any trouble the code is displayed on the LED controller.
Malfunction LED Reason Solution
Controller
Water inlet temperature PP1 The sensor is open Check or change
sensor failure .or short circuit the sensor
Water let temperature PP The sensor is open Check or change
sensor failure or short circuit the sensor.
PP The sensor is open Check or change
failure or short circuit the sensor.
PP The sensor is open Check or change
failure or short circuit the sensor.
PP The sensor is open Check or change
failure or short circuit the sensor.
erature PP Check the water flow switch.
between
aw o
P
Anti freezing
Malfunction of E 1 S
system 1 the
mal
(Only 3 phase units)
. Only for 3-phase engines.
n
Refrigerant
low
The water-in and water-
out temp. difference too s .
high. Error is displayed
after this occurs for
3 times within 30 minutes.
Communication failure EE8
out 2
Coil 1 sensor 1 3
Coil 2 sensor 2 4
Ambient air sensor 5
Temp difference 6 Water flow volume not
water-in sufficient, water pressure Check the water flow volume,
nd ater-out is too large to low. or system obstruction.
The first time freezing PP7 Ambient or inlet water Drain the water from the unit
indication temperature is too low.
The second time freezing P 7 Ambient or inlet water Drain the water from the unit
indication temperature is too low.
- PP7 Outlet water temperature Check the water flow volume
under cooling mode is too low. or outlet water temp. sensor.
E ystem 1(or 2) protection Check each protection point of
or 2 EE2 has failed. system 1(2), remove the
function according to System
Protection Board Malfunction
Table
Flow switch failure EE3 No or too little water flow Check the flow/ pump functioning
Switch failure Check/change the switch.
Wrong power supply EE4 Wrong connections Check the connection
connection or no connection of the power cable.
Wrong power supply nothing
con ections displayed
(PP25C/PP28C) (3 ph.)
High/low pressure EE4 charge too Check through each pressure
(PP10C/PP15C/ or high. Possible switch and return circuit.
PP25C/PP28C) system blockage.
EE5 Water flow rate not Check the water flow rate or
ufficient whether the system is jammed.
LED controller and Check the wire connection or
PCB connection failure change LED controller or PCB.
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