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System Testing & Troubleshooting
To operate the system in the TEST MODE, press the SERVICE
MODE key to enter into the service mode menu and scroll
through all of the system outputs and selectively turn them
"On" or "Off".
Used on Units:
Possible Values:
On, Off
1. Press the + or - key until the proper value is displayed.
2. Press the ENTER key to confirm this choice.
3. Press the NEXT key until the following screen is displayed.
Used on Units:
Possible Values:
On, Off
1. Press the + or - key until the proper value is displayed.
2. Press the ENTER key to confirm this choice.
3. Press the NEXT key to advance the cursor to the "Ckt 2"
Circuit 2 is used for 40 through 60 Ton units only.
4. Press the + or - key until the proper value is displayed.
5. Press the ENTER key to confirm this choice.
6. Press the NEXT key until the following screen is displayed.
Used on Units:
Possible Values:
On, Off
1. Press the + or - key until the proper value is displayed.
2. Press the ENTER key to confirm this choice.
3. Press the NEXT key to advance the cursor to the "Ckt 2"
Circuit 2 is used for 40 through 60 Ton units only.
4. Press the + or - key until the proper value is displayed.
5. Press the ENTER key to confirm this choice.
6. Press the NEXT key until the following screen is displayed.
Used on Units:
With Hot Gas Bypass Option
Possible Values:
On, Off
1. Press the + or - key until the proper value is displayed.
2. Press the ENTER key to confirm this choice.
3. Press the NEXT key until the following screen is displayed.
Used on Units:
20 to 30 Ton
Possible Values:
On, Off
1. Press the + or - key until the proper value is displayed.
2. Press the ENTER key to confirm this choice.
3. Press the NEXT key to advance the cursor to the "K11"
4. Press the + or - key until the proper value is displayed.
5. Press the ENTER key to confirm this choice.
6. Press the NEXT key until the following screen is displayed.
CGM Evap Solution Pump Relay: OFF
Liquid Line Solenoid Valve Ctrl Relays:
Ckt 1 ON Ckt 2 OFF
CGM Hot Gas Bypass Control Relay: OFF
Low Ambient LPC Bypass Relay(s)
Ckt 1 ON Ckt 2 OFF
Compressor Relays
K11 OFF K12 OFF
SERVICE MODE Menu
The SERVICE MODE menu is used to input operating pa-
rameters for unit operation during a service test. Depending
on the particular test being conducted, the user will cycle
through all unit outputs (compressors, fans, pump, etc...)
and selectively turn them On or Off for the test. After desig-
nating the operating status for each unit component, the op-
erator will designate the "TEST START" delay time.
When a service mode screen is displayed for 30 minutes
without a key being pressed, the LCD screen will revert to
the general operating status display. If this happens, press
the SERVICE MODE key again to return to the service
menu.
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