Remington REM-05-240-GH Service Manual download pdf (Page 18)

Electronic Control Error Code Diagnostics

Error

Code

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An extreme low voltage condition exists <198V

for 230V units and <239V for 265V units.

Shut unit down. Flash error code. When

voltage rises to adequate level normal unit

operation is restored.

• Inadequate power supply

• Defective breaker

• Blown fuse

Return air thermistor sensor open or

short circuit

Leave unit running. Alternately flash error

code and set point.

• Defective sensor

Indoor coil thermistor sensor open or

short circuit

Leave unit running. Alternately flash

error code and set point.

• Defective sensor

Outdoor coil thermistor sensor open

or short circuit

Leave unit running. Switch to Electric Heat

Mode (Heat Pump only). Alternately flash

error code and set point.

• Defective sensor

Outdoor coil Temperature > 175° F for

2 consecutive minutes. (Heat Pump

models only)

Shut unit down for 5 minutes, Alternately

flash error code and set point, then try again

2 times, if unit fails the 3rd time then shut

unit down and alternately flash error code

and set point.

• Dirty coil

• Fan motor failure

• Restricted air flow

• Non-condensables in refrigeration sys

Indoor coil temperature <30° F for 2

consecutive minutes.

Shut down Compressor, and continue fan

operation. Alternately flash error code and

set point until the indoor coil thermistor

reaches 45° F. Then, (after lockout time of

180 to 240 seconds expires), re-energize

the compressor .

• Dirty filters

• Dirty coil

• Fan motor failure

• Restricted air flow

• Improper refrigerant charge

• Restriction in refrigerant circuit

Unit cycles (Heat or Cool demand) >

9 times per hour

Leave unit running. Store error code in

memory.

• Unit oversized

• Low load conditions

Unit cycles (Heat or Cool demand) <

3 times per hour

Leave unit running. Store Error Code in

memory.

• Unit undersized

• High load conditions

10 Room Freeze Protection triggered

Leave unit running. Alternately flash error

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11 No Signal to “GL or “GH” terminal Shut unit down. Flash error code.

• Defective remote thermostat

• Defective thermostat wiring

12 Discharge air temperature >185° F

Shut down Compressor and/or Heater, and

energize high fan. Alternately flash error

code and set point. If condition repeats

three times in one hour, shut unit down.

• Restricted air flow

• Fan motor failure

Pressure switch jumper wire loose/missing

High Pressure switch open (If so equipped)

Shut unit down. Flash error code.

• Dirty coil

• Fan motor failure

• Restricted air flow

• Non-condensables in refrigeration system

Discharge air temperature sensor open or

shorted

Leave unit running. Alternately flash error

code and set point.

• Defective Sensor

Diagnostics

The Friedrich Smart Center continuously monitors

the PTAC unit operation and will store service codes if

certain conditions are witnessed. In some cases the unit

may take action and shut the unit off until conditions are

corrected.

To access the error code menu press the ‘Heat’ and

‘High Fan’ buttons simultaneously for three seconds. If

error codes are present they will be displayed. If multiple

codes exist you can toggle between messages using

the temp button. To clear all codes press the temp

button for three seconds while in the error code mode.

To exit without changing codes press the ‘Low Fan’ button.

EF = Error Free

Test Mode

For service and diagnostic use only, the built-in

timers and delays on the PTAC may be bypassed

by pressing the ‘Cool’ and ‘Low Fan’ buttons

simultaneously for three seconds while in any

mode to enter the test mode. CE will be displayed

when entering test mode, and OE will be displayed

when exiting. The test mode will automatically be

exited 30 minutes after entering it or by pressing

the ‘Cool’ and ‘Low Fan’ buttons simultaneously

for three seconds.

Note:

To access the Test Mode while under remote wall

thermostat operation, remove thermostat’s wires

at the terminal block on the electronic control

board then connect a jumper wire between GL

and GH.

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Remington REM-05-240-GH Service Manual Page 18

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