Flash com ok led description, Installer system test, Caution – Honeywell W8635A User Manual

Page 4

Advertising
background image

W8635A EQUIPMENT INTERFACE MODULE

69-1339—2

4

Flash COM OK LED Description

LED blinks rapidly—indicates device is currently trans-

mitting information on the communications bus.

LED blinks once—indicates device received and

acknowledged a message.

LED on constantly—indicates device failure. Replace

device.

LED off constantly—indicates a wiring problem if

device is not functioning properly and there is no
LED activity at least once a minute. Check wiring to
communications bus terminals 1, 2 and 3.

NOTE:

It is normal for LED to blink continuously dur-
ing startup and discovery.

LED blinks continuously—indicates a wiring problem

if device is not functioning properly and there is a
continuous series of LED blinks. Check wiring to
communications bus terminals 1, 2 and 3.

INSTALLER SYSTEM TEST

Use the Installer System Test to check the thermostat
and W8635A EIM operation for each thermostat in the
system. Table 5 lists the available system tests.

Table 5. Installer System Tests.

CAUTION

Equipment Damage Hazard.
Minimum compressor off-time is bypassed
during Installer System Test.
Do not allow compressor rapid cycling (on and
off).
Observe compressor protection period.

To start the Installer System Test:

1.

Press and hold the T8635L Thermostat increase

and decrease

keys at the same time until 10

appears. All display segments display before the
10 appears. See Fig. 7 and 8.

Fig. 7. LCD segments display.

Fig. 8. Installer Test Number display.

2.

Refer to Table 6 for Installer System Test option.

Test Number

System Test Description

10-12

Heating stages can be turned on and
off in sequence

30-32

Cooling stages can be turned on and
off in sequence

40-42

Fan and damper test

60

Keyboard keys test

70-74

Thermostat information including date
code and software versions are
displayed.

Aux Ht

Heat

Auto

System

Fan

Off

Auto

Wake

Mon

Wait

In

Room

Outdoor

%Humid

Auto

Sav

AM

PM

Hold for

Cool

Repl Batt

On

Recovery

DST

Cool

TueWedThuFriSatSun

LeaveReturnSleep

M10345A

Set Program

Set Day/Time

Start Time

Temporary Setting Enrg

Em Heat

Em Ht

Filter

M10257A

TEST NUMBER

Table 6. Installer System Test Options.

Key to Press

Test Number

Description

Heating Equipment System Test

10

Enter Heating Equipment system test.

11

First Stage Heat turns on.

12

Second Stage Heat turns on.

11

Second Stage Heat turns off.

10

First Stage Heat turns off.

Cooling Equipment System Test

30

Enter Cooling Equipment system test.

31

First Stage Cool turns on.

32

Second Stage Cool turns on.

31

Second Stage Cool turns off.

30

First Stage Cool turns off.

Advertising