Mitsubishi Electric PUMY-P112VKM1, Руководство по обслуживанию

Страница: 63 / 156

Check code
Abnormal points and detection methods Causes and check points
Abnormal if drain sensor or float switch detects to be in the water during
cooling or dry operation.
To release this abnormality, reset the power (turn OFF and ON).
TH21: Indoor intake temperature thermistor
TH22: Indoor liquid pipe temperature thermistor
TH23: Indoor gas pipe temperature thermistor
Reverse connection of extended piping (when
connecting multiple units)
Reverse connection of indoor/ outdoor connector
Defective thermistor of TH21 or TH22/23
Defective drain sensor or float switch
Defective drain pump
Poor drainage
· Clogged drain pump
· Clogged drain pipe
●Diagnosis of defectives
Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
Diagnosis Remedy
2500
Water leakage
No
No
No
No
Yes
Yes
Yes
Yes
Yes
No
Are there 2 or more
indoor units with different
refrigerant connected?
Check the temperature
of TH22/23 if they are
within appropriate range.
Are they within the range?
Does the drain pump work?
Is the drain level
unusually high?
Are the refrigerant piping
and the indoor/ outdoor connector
connected in the same unit?
Solve the reverse connection, or connect
the connectors properly.
Refer to the diagnosis of check code<1100>.
Refer to the diagnosis of check code<2502>.
Check the drain discharge system for:
· Dirty drain pan (needs to be cleaned)
· Clogged drain pump
· Clogged or reverse connection of drain pipe
Start heating operation.
· In heating operation
The temperature difference between
the intake and blowing air:
Approx. 14 to 30
:
.
Piping temperature: Approx. 40 to 55
Note:
The temperature may differ depending
on the operating condition.
Turn ON the emergency
operation switch (SWE).
Continue to the next page
Chart 1 of 2
63
OCH576