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ESIE15-08B
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Part 2. Troubleshooting
4. Component checklist - Water Circuit
Page 74
19/07/16
Daikin Altherma Monobloc CA
most used commands.
7.
Select Actuator test run A.7.4.
8.
Activate the water pump (A.7.4.6).
9.
Check the LED on the water pump, it must light green.
10. If the LED does not light:
-
Check fuse FU1 on A1P, replace if blown.
-
Measure the voltage at X25A: pin 1 - 2 on A1P PCB, the voltage must be 230 VAC ±10%, if not replace A1P.
11. Replace the water pump M1P.
LED Status
Meaning
Diagnostic
Cause
Corrective action
Lights green
Pump in operation
Pump runs according to
its setting
-
-
Blinks green (fast)
PWM model
Pump in stand-by
Normal operation
-
Blinks red/green
Pump in operation
but stopped
Pump will restart after
fault is solved
Undervoltage U < 160 V
or
overvoltage U > 230 V
Check voltage supply
195 V < U < 253 V
Module overheating:
motor temperature too
high
Check water and ambi-
ent temperature
Too hot water of exter-
nal circuit entering the
system
Check external circuit
water temperature.
Blinks red
Pump malfunction
Pump stopped (blocked)
Pump does not restart
automatically due to
permanent failure
Replace pump
Off
No power supply
No voltage present on
electronics.
Pump is not connected
to power supply
Check pump wiring
LED is broken
Check if pump is run-
ning
Pump electronics mal-
functioning
Replace pump