ICP 9MAC/E series, Руководство по устранению неисправностей

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STEP ACTION YES NO GO TO
58. Do you have continuity between the GRAY wire on the medium pressure switch MPS and
the YELLOW wire on the low pressure switch?
59 13
59. The GRAY wire is shorting to the YELLOW or ORANGE wire that goes to the low pressure
switch LPS.
12
60. Check the collector box pressure tap for blockages. Use the back end of a small drill bit to
clear debris out of the collector box pressure tap opening. It may be necessary to remove the
collector box and clear away the debris if it keeps clogging.
61
61. Check the tubing between the collector box and the pressure switch assembly for leaks or
blockages.
62
62. Check the tube between the pressure switches for leaks or blockages. 63
63. Check the unused trap openings and make sure they are plugged. 31
Status Code 10
POLARITY - Indicates line voltage polarity is reversed, furnace is not grounded, or the transformers are out of phase in
twinned units.
STEP ACTION YES NO GO TO
1. Is this furnace twinned with another furnace? 7 2
2. Remove blower door and depress door switch. Use a piece of tape to hold switch closed. 3
3. Is 115-vac across L2 and chassis ground? 4 20
4. Line voltage polarity is reversed. Fix problem. 5
5. Go to page number indicated in Index for CLEANUP AND START-UP INSTRUCTIONS. INDEX
6. Replace the modulating furnace control. 5
7. Remove blower door and depress door switch in each unit. Use tape to hold switches closed. 8
8. Is the AMBER LED status light blinking rapidly in only one of the twinned units? 9 16
9. Are the fuses, breakers, or manual disconnects to the problem unit correctly set? 11 10
10. Fix problem. 5
11. Are the Auxiliary Limit switches properly set? 12 10
12. Do you have 115-vac across L1 and L2 in the problem unit? 13 15
13. Do you have 24-vac across SEC-1 and SEC-2 in the problem unit? 6 14
14. Replace the transformer. 5
15. Turn power off to both units. Check continuity of power leads and door switch in the
problem unit. If necessary repair power leads and/or replace door switch in the problem unit.
5
16. Check the furnace circuit breaker location in the service panel.
On single-phase (residential) systems, each furnace circuit breaker should be located directly
across from each other in service panel, or each furnace circuit breaker should be located on
the same side of service panel, but must skip 1 space to be connected to the same leg of the 1-
phase power supply.
On 3-phase (commercial) systems, each furnace circuit breaker should be located directly
across from each other in service panel, or each furnace circuit breaker should be located on
the same side of service panel, but must skip 2 spaces to be connected to the same leg of the
3-phase power supply.
17
17. Check the 115-vac power lead connections at the modulating furnace control of each furnace.
The BLACK lead goes to L1 and the WHITE lead goes to L2.
18
18. Check the 115-vac transformer lead connections at the modulating furnace control of each
furnace. The BLACK lead goes to L1 and the WHITE lead goes to L2.
19
19. If the circuit breaker location and the 115-vac wiring is correct reverse the transformer
secondary lead connections SEC-1 and SEC-2 in the MAIN furnace.
5
20. Is the furnace properly grounded back to the service panel? 6 10
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