Lennox 16B27 User Manual

Page 11
Table 9. AHC Single Character Display — Error Codes (Communicating and Non-Communicating)
Error Codes Status of Air Handler
E 3Y8
Relay Y2 failure.
E 350
Heat call with non-congured or mis-congured electric heat. Check for proper conguring under Conguring Electric Heat Stag-
es.
E 351
Heat section / Stage 1 failed (Pilot relay contacts did not close or the relay coil in electric heat did not energize)
E 352
Heat section / Stage 2 failed.
E 353
Heat section / Stage 3 failed.
E 354
Heat section / Stage 4 failed.
E 355
Heat section / Stage 5 failed.
Error codes 401 through 409 are only displayed when the Control’s L
terminal is connected to a non-communicating outdoor unit’s LSOM
device.
E 401
Compressor ran more than 18 hours in air conditioning mode.
E 402
Compressor system pressure trip.
E 403
Compressor short-cycling - running less than four minutes.
E 404
Compressor rotor locked.
E 405
Compressor open circuit.
E 406
Compressor open start circuit.
E 407
Compressor open run circuit.
E 408
Compressor contactor is welded.
E 409
Compressor low voltage.
E 420
Defrost cycle lasts longer than 20 minutes. Check heat pump operation. Cleared when W1 signal is removed. Applicable only in
communicating mode with non-communicating heat pump.
** Cutback Mode — The variable speed motor has pre-set speed and torque limiters to protect the motor from damage caused by operating out of
its designed parameters (0 through 0.80 in. w.g. total external static pressure).
Air Handler Jumpers
Jumpers are used for non-communicating mode only. Use
gure 2 as reference for jumper settings. If any of the ref-
erence jumpers are missing, the air handler control will
display Error code 130 and the air handler control will au-
tomatically use the factory default setting.
1. Humidication – Controls the status of H terminal on
the thermostat block. Congurations are as follows:
• If jumper is installed in SMART Humidication posi-
tion (Default), H terminal is active if heat demand is
present and indoor blower is running.
• If jumper is installed in AUTO Humidication posi-
tion, H terminal is energized whenever indoor blow-
er is running.
2. EvenHeat – Target Discharge Air Temperature
selection is used to set discharge air temperatures for
EvenHeat operation.
NOTE - Optional Discharge Air Temperature Sensor, Len-
nox Catalog # 88K38 is REQUIRED for EVENHEAT oper-
ation and must be ordered separately.
1. Blower Only CFM – Used to select Indoor blower CFM
for continuous operation.
2. Heat – Used to select Indoor blower CFM for electric
heat by placing the jumper in proper position. Actual
CFM values for different air handler sizes are shown in
Targeted CFM Tables.
3. Cool – Used to select cooling indoor blower CFM
by placing the jumper in proper position. Actual CFM
values for different air handler sizes are shown in
Targeted CFM Tables starting.

Lennox 16B27 Specifications

General

Brand	Lennox
Model	16B27
Category	Heat Pump
Language	English