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.
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DIAGNOSIS AND SOLUTION (CONT.)
PC 03 - Low Pressure Protection Diagnosis and Solution
Description: If the sampling voltage is not 5V, the LED displays a failure code.
Recommended parts to prepare:
• Connection wires
• Low pressure protector
• Indoor fan assembly
• Outdoor PCB
Troubleshooting and Repair:
Low pressure protection
?
Are the low pressure protector
and main control board wired
properly?
Yes
Reconnect the low pressure protector
and main control board.
Replace outdoor main board.
No
Replace the low pressure protector.
Is the outdoor ambient
temperature too low ?
No
Stop the unit.
Yes
Open the valve core of the high
pressure valve.
No
Is the valve core of the high
pressure valve fully opened?
Is the indoor fan running
properly in cooling mode?
.
Refer to the solution to the malfunction
of fan speed being out of control. Find
the cause and resolve the problem.
No
Yes
Yes
.
Check whether the refrigerant
system is functioning properly.
No
?
Is it in working order?
No
No
Yes
When the refrigerant level is not
sucient, does the system function
properly after more refrigerant
is added?
Is the low pressure protector broken?
Method: Disconnect the plug.
Measure the resistance of the low pressure
protector. If the protector is normal,
the value is 0.

Midea DLFSAB Series Specifications

General

Brand	Midea
Model	DLFSAB Series
Category	Air Handlers
Language	English