A6" Indoor Unit: Pump Error (M1P) Or Other Water System Error; Remote Control; Applicable Models - Daikin ERSQ 011AAV1 Service Manual

ESIE09-08
"A6 " Indoor Unit: Pump Error (M1P) or Other Water
3.2
System Error
A6

Remote Control

Display
Subcode 0
Applicable
All indoor unit models
Models
Method of Detection by failure of signal for detecting number of turns to come from the pump motor.
Detection by failure ref. sensors.
Malfunction
Detection
Malfunction
When number of turns cannot be detected even when output voltage to the pump motor is
Decision maximum. When water sensors are not within expected range.
Conditions
Supposed
Causes
Troubleshooting
Troubleshooting
Pump rotor locked
Disconnected or faulty wiring between pump connector and PC board (A1P)
Blocked waterflow or heat exchanger (waterside)
Be sure to turn off power switch before connecting or disconnecting connector,
Caution otherwise parts may be damaged.
YES
Is the pump
rotor locked?
NO
Is the
YES
waterflow or heat
Can be checked - Too high T° difference
exchanger
|Return water
blocked?
|Leaving water T° - condense temp|>15°C
NO
|Leaving water
Is the
wiring from the
NO
pump securely connected
Connect the wiring and turn on again.
to connectors (X20A) on the
indoor unit PC board?
(A1P)
YES
Wiring
between the indoor YES
unit PC board and pump is Fix the wiring and turn on again.
disconnected.
NO
YES
Does the pump run?
Replace the indoor unit PC board.
NO
Replace the pump motor.
Troubleshooting by Indication on the Remote Controller
Make sure all valves are open.
Make sure filter is not clogged.
- R-134a liquid T°|>40°C
- Too small T° difference
- return water temp|<1°C
Make that sure water pressure is OK
(0,3bar<P<3bar).
Make sure that all valves are open.
Make sure that all air is out of the system.
(V2779)
131