Drain Pump Control - Daikin Sky Air R-407C Service Manual

ESIE02–01
1.14

Drain Pump Control

Applicable units The drain pump control is applicable for the following units:
Model type
Cassette
Duct
Corner
Ceiling
Purpose The purpose of the drain pump control is to control the water draining from the drain pan.
Starting conditions The drain pump control starts the drain pump when one of the following conditions is fulfilled:
Method The float switch opens because an abnormal drain level is detected in the drain pan.
The table below describes the activation at open float switch.
Situation
Thermostat ON
Thermostat OFF
Float switch opens each time the
drain pump stops.
Used input The drain pump control uses the following inputs:
Input
Float switch (33H)
Magnetic relay drain pump (RyP)
Part 2 – Functional Description
Model name
FHYCP (standard) and FUYP (standard)
FHYBP (standard) and FDYP (optional)
FHYKP (standard)
FHYP (optional)
The cooling operation is activated, or
The level in the drain pan becomes abnormally high, or
Freeze-up prevention is detected in cooling operation.
Activation at open float switch
1. The thermostat is immediately turned OFF.
2. The drain pump continues to operate for minimum 10 min.
3. If the float switch closes again within 80 s, cooling can
restart after the 10 min recovery.
1. The thermostat stays forced OFF.
2. The drain pump starts to operate for minimum 10 min.
3. If the float switch closes again within 80 s, cooling can
restart after the 10 min recovery.
After five retrials the error code "AF" flashes on the remote
control.
Connection on
indoor PCB
X15A
X25A
General Functionality
2
Connection on
outdoor PCB
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