Daikin EUWAB10KBZW1, Service Manual

Page: 107 / 210

ESIE11-02 Functional Description
Part 2 – Functional Description 2–21
3
2
4
5
1
Defrost starting
timers The table below describes the timers important to start the defrost cycle.
Timer Description Steps and conditions
Start-
value
TimConditional 1/2 The minimum time that the defrost start
condition 1 or 2A must be met to start
the defrost cycle.
■
Start of timer
Coil & Ambient below start condition 1 or 2A
AND
Compressor on by thermostat (DI3/4
M1/2Cdetect = closed)
■
Reset of timer (no requests)
Coil & Ambient above start condition 1 or 2
with differential of +2°C on coil temperature
OR
Compressor switched off by thermostat
(DI3/4 M1/2Cdetect = open)
■
End of timer (goes to 0)
Then defrost requests start
150 s
TimOperate1/2 The minimum time that the defrost
condition 2B must be met to start the
defrost cycle. This timer is accumulated
time.
■
Start or continue timer
Coil & Ambient below start condition 2B
AND
Compressor on by thermostat (DI3/4
M1/2Cdetect = closed)
■
Stop of timer
Coil & Ambient above start condition 2B
OR
Compressor switched off by thermostat
(DI3/4 M1/2Cdetect = open)
■
Reset of timer (no requests)
Switch off unit (DI6PumpDetect = open)
2 h
TimComprMin1/2 The minimum time that the compressor
must be switched on before the circuit
can start the defrost cycle.
■
Start of timer
Compressor switched on by thermostat
(DI3/4 M1/2Cdetect = closed)
■
Reset of timer (no requests)
Compressor switch off by thermostat (DI3/4
M1/2Cdetect = open)
20 s
End of TimOperate1/2 AND TimComprMin timer (goes to 0): Then defrost request