Daikin FHC45BZ7V1, Service Manual

Page: 199 / 304

ESIE02–01 General Functionality
Part 2 – Functional Description 2–19
3
2
4
5
1
1.14 Drain Pump Control
Applicable units The drain pump control is applicable for the following units:
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:
■
The cooling operation is activated, or
■
The level in the drain pan becomes abnormally high, or
■
Freeze-up prevention is detected in cooling operation.
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.
Used input The drain pump control uses the following inputs:
Model type Model name
Cassette FHYCP (standard) and FUYP (standard)
Duct FHYBP (standard) and FDYP (optional)
Corner FHYKP (standard)
Ceiling FHYP (optional)
Situation Activation at open float switch
Thermostat ON 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.
Thermostat OFF 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.
Float switch opens each time the
drain pump stops. After five retrials the error code “
AF
” flashes on the remote
control.
Input
Connection on
indoor PCB Connection on
outdoor PCB
Float switch (33H) X15A —
Magnetic relay drain pump (RyP) X25A —