91
Startup problem
The amount of pulses for the water flow meter during start-up is not reached in
time.
-
Open and close the machine door for restart.
-
If message shows again, check the expansion valve, 2 bar valve, pumps,
water inlet from mains and inlet valve.
-
Check water flow meter.
Temp. sensor 1 / 2 disconnected
-
A too high resistance is detected on the input of the IO board.
-
Temperature probe is broken, or wiring is loose.
Temp. boiler 1 / 2 too high
A temperature of 10 degrees more as the adjusted temperature is detected.
-
Check if heater is broken and keeps heating.
-
Check temperature setting.
-
Check temperature probe.
-
Check wiring loose/bad contact.
-
Check the boilers are correct connected, don’t switch the wires for boiler
one with boiler two.
Water filter installed?
-
In service mode the correct selection needs to be made.
Water level 1 / 2 too low
No water level is detected by the level probe in the boiler.
-
Check level sensor
-
Check if wire from probe is connected to the cable loom.
-
Check if the ground is connected to the boiler.
-
Check if the boiler is leaking water due to leakage or wrong connected
valve.
Summary of Contents for COEX 9CND SERIES
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