YMGI
•
Your Modern Green Idea
40
DIAGNOSTIC CODES
The Diagnostic Maintenance provides detailed information on PTAC control operation and operational status
including present modes, failures, airflow restriction warnings, operating temperatures, and past failures.
To enter Diagnostic Status Report mode, press and hold the down arrows and, while hold press the FAN
SPEED key for a period of five (5) seconds.
The meaning of figure on display pad is as below:
X.X----(0~4: time of protection)
└
━
is protection mode(1: anti-frost; 2: overheat; 3: high pressure; 4:anti-freezing)
Protective Auto Diagnostics
Failure code
Content of defect
E2
Indoor temperature sensor failure
E3
Indoor coil temperature sensor failure
E4
High temperature protection of air outlet
E5
Outdoor coil temperature sensor failure
E8
Overheating protection/defrosting
E9
High temperature protection of outdoor coil
DIP Switch Settings
Switch
Description
Function
Factory Setting
#1
Anti-Cold Air
ON-Enable : OFF-Disable
OFF
(15K HP Only)
#2
Heat Pump
ON-Enable : OFF-Disable
HP: ON
AC: OFF
#3
Electric Heat
ON-Enable : OFF-Disable
With E. HEAT OFF
Without E-HEAT ON
#4
Heating Priority
ON-Heat Pump Priority
OFF-Electric Heat Priority
(Only available for panel control)
HP: ON
AC: OFF
#5
Room Freeze Protection
ON-Allows the unit to ensure the indoor room
temperature does not fall below 40°F
OFF-Disable freeze protection
HP: ON
AC: OFF
#6
Electric Memory
ON-Enable : OFF-Disable
ON
#7
Fan CYC for Cooling
ON-Enable : OFF-Disable
ON
#8
Set temp. step for
One/two degrees
ON-Set temp step for two degrees
OFF-Set temp step for one degree
OFF
