Midea DLFSAB Series User Manual

DLFSAB and DLFLAB: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
27
DIAGNOSIS AND SOLUTION (CONT.)
PC 02 - Top temperature protection of compressor or High temperature protection of IPM module Diagnosis
and Solution
Description: For some models with overload protection, if the sampling voltage is not 5V, the LED displays the failure. If the
IPM module temperature is higher than a certain value, the LED displays the failure code.
Recommended parts to prepare:
• Connection wires
• High pressure protector
• IPM module board
• System blocks
• Outdoor PCB
Troubleshooting and Repair:
Check if the air ow system
of the indoor and outdoor units
is obstructed.
Clear the air inlet and outlet or the indoor
and outdoor unit’s heat exchanger.
Yes
No
Yes
Yes
Turn o the power supply.
Wait 10 minutes and turn back on.
Check if the compressor top
temperature is higher
than 194°F(90°C).
No
Check if the refrigerant system
is normal.
Repair the
refrigerant system.
Replace the outdoor control PCB.
Yes
Check if all the connection, especially the
connection of OLP (Over Load Protector)
sensor is good.
Correct the connection.
No
Measure the resistance
between the two ports of
the OLP. Is it zero?
Yes
Replace the OLP.
No
Replace the outdoor control PCB.
Yes
No
Check the fastening screws on the
PCB and IPM radiator.
Are they secure?
Replace the outdoor
control PCB.
Tighten the screws and apply
silicon grease.
NO
YES

Midea DLFSAB Series Specifications

General

Brand	Midea
Model	DLFSAB Series
Category	Air Handlers
Language	English