Esco Ascent max, User And Service Manual

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Faulty relays
•
Turn off the cabinet.
•
Check LS1 relay on the Relay Board. See Drawing 2 ‐ 5 below.
•
Make sure all wiring and connections are correct.
•
On terminal J 2, check the NO to Common and NC to Common circuits by checking
continuity.
•
If the NO to Common and NC to Common contacts are not correct, replace the Relay
Board.
•
If the NO to Common and NC to Common contacts are correct, proceed to the next
step.
•
Check K1 relay, see drawing Layout A at the end of this section to locate the K1
relay.
•
With cabinet still switched ‐ off, check if the cables connected to the relay socket are
tight. See drawing 2 ‐ 6 below.
•
Visually inspect the relay for burnt contacts or flask marks on the inside of the relay
case. (Relay is the one with transparent, rectangular, plastic case)
•
Check NO to Common and NC to common contacts on relay K1. The method is same
as for LS1 relay.
•
If the relay K1 shows signs of arching (burnt marks) or the NO ‐ C and NC ‐ C circuits are
not correct, replace the relay.
Auto ‐ thermal cut ‐
off
•
Check the Fan for overheating – The motor has a thermal cut out built ‐ in.
•
Wait 60 minutes with the FAN turned off and then try to restart.
•
If the FAN restarts determine why there is excessive heat in the cabinet.
•
If the FAN does not restart proceed to the next step.
Motor failure
•
Check whether the motor can rotate properly and not loosened.
•
Check for physical damage.
•
If present, replace the blower.
Power 50Hz 60Hz
115V AC±10% 18 ‐ 22 μ f
230V AC±10% 7.5 ‐ 8 μ f 9 ‐ 11 μ f
Figure 2 ‐ 4
Table 1
Figure 2 ‐ 5
Figure 2 ‐ 6