P5 - The condensate drain pump has a fault.
Mitsubishi Electric lists P5 as a drain pump error in the PEAD check-code table. That points to a problem with condensate removal rather than a normal operating mode or user setting.
Applies to the PEAD-M50-140JAA installation-manual family; concealed drain-pump arrangements vary with site installation.
Severity
High
Display
Shown as check code P5 on the wired remote controller. On supported self-check patterns, five beeps/flashes map to P5.
Support first?
Often not
Models in range
PEAD-M50JAA(D), PEAD-M60JAA(D), PEAD-M71JAA(D)
What to do first
Start with these checks
- 1Turn the unit off to reduce the risk of overflow.
- 2Check for obvious water leakage from ceiling outlets or the indoor unit if safely accessible.
- 3Arrange service before resuming normal use if the code remains.
Likely causes
What usually sits behind this code
Drain pump failure
Pump wiring or connector fault
Blocked or restricted condensate drain line causing pump abnormality
Contact support
Contact customer support if any of these apply
- !P5 stays on after restart
- !Water is dripping or pooling
- !The unit shuts down during cooling with the code active
- - The PEAD family page notes a built-in condensate pump as a standard feature.
- - Drain-pump faults often need service access to the concealed indoor section.
Related codes
Nearby codes in this family
More ranges
More Mitsubishi Electric air-conditioner ranges
Source notes
Source and scope
Source: Mitsubishi Electric Australia installation manual
The PEAD-M50-140JAA installation manual lists P5 in the check-code table as 'Drain pump error'.
Last reviewed: 2026-04-19
The official code meaning identifies the affected subsystem, but not whether the root cause is the pump, float logic, or drain route.