Indoor Unit: Malfunction Of Drain Level Control System (33H) - Daikin VRV K Manual

SI-95.BOOK Page 79 Friday, March 31, 2000 10:59 AM
Si-95
2.3

Indoor Unit: Malfunction of Drain Level Control System (33H)

A A A A 3 3 3 3
Remote Controller
Display
I Defect of float switch or short circuit connector
Supposed Causes
I Defect of drain pump
I Drain clogging, upward slope, etc.
I Defect of indoor unit PC board
I Loose connection of connector
Troubleshooting
Troubleshooting Inverter K Series
The float
NO
switch is connected to
X18A of the indoor unit
PC board.
YES
The float
switch contact is
forming a short circuit YES
(continuity check with
X18A disconnected)
NO
NO
Water builds up
in the drain pan.
YES
The drain
pump is connected to
NO
X25A or terminals X8S
and X9S of the indoor
unit PC board.
YES
The drain
YES
pump works when
the power supply is reset
for the indoor unit.
NO
The voltage
of terminals Y1 and Y2 or
NO
X25A is 220~240 V (within 5
minutes of resetting
the power supply).
YES
A short
NO
circuit connector is
Connect
connected to X18A.
connector or float switch and turn on
again.
Becomes
NO
normal when X18A of
Defect of indoor unit PC board
the indoor unit PC board
is short circuited
YES
Loose connection of connector
NO
The float switch
Replace float switch
functions normally.
YES
Modify the float switch's connection
and turn on again.
Connect the drain pump and turn on
again.
Check the drain piping for clogging or
upward slope, etc.
Replace indoor unit PC board.
Replace the drain pump or check for
dirt, etc.
Troubleshooting
either a short circuit
(VF030)
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